-
Notifications
You must be signed in to change notification settings - Fork 1.6k
/
Copy pathWindowsFormsApplicationBase.xml
1932 lines (1706 loc) · 129 KB
/
WindowsFormsApplicationBase.xml
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<Type Name="WindowsFormsApplicationBase" FullName="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase">
<TypeSignature Language="C#" Value="public class WindowsFormsApplicationBase : Microsoft.VisualBasic.ApplicationServices.ConsoleApplicationBase" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi WindowsFormsApplicationBase extends Microsoft.VisualBasic.ApplicationServices.ConsoleApplicationBase" />
<TypeSignature Language="DocId" Value="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" />
<TypeSignature Language="VB.NET" Value="Public Class WindowsFormsApplicationBase
Inherits ConsoleApplicationBase" />
<TypeSignature Language="F#" Value="type WindowsFormsApplicationBase = class
 inherit ConsoleApplicationBase" />
<TypeSignature Language="C++ CLI" Value="public ref class WindowsFormsApplicationBase : Microsoft::VisualBasic::ApplicationServices::ConsoleApplicationBase" />
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>Microsoft.VisualBasic.ApplicationServices.ConsoleApplicationBase</BaseTypeName>
</Base>
<Interfaces />
<Docs>
<summary>Provides properties, methods, and events related to the current application.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The properties exposed by the `My.Application` object return data that is associated only with the current application or DLL. No system-level information can be altered with `My.Application`.
The `My.Application` object consists of the following classes:
- <xref:Microsoft.VisualBasic.ApplicationServices.ApplicationBase> provides members that are available in all projects.
- <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase> provides members that are available in Windows Forms applications.
- <xref:Microsoft.VisualBasic.ApplicationServices.ConsoleApplicationBase> provides members that are available in console applications.
## Examples
This example uses a loop to iterate through the application's open forms, selects the forms that can be accessed directly by the current thread, and displays their titles in a <xref:System.Windows.Forms.ListBox> control. For information about how to access the open forms, see <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OpenForms%2A>.
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrMyApplication/VB/Form1.vb" id="Snippet10":::
This example requires that your Windows Forms application have a form named `Form1` that contains a list box named `ListBox1`.
]]></format>
</remarks>
<altmember cref="T:Microsoft.VisualBasic.ApplicationServices.ConsoleApplicationBase" />
<altmember cref="T:Microsoft.VisualBasic.ApplicationServices.ApplicationBase" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
<Members>
<MemberGroup MemberName=".ctor">
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Initializes a new instance of the <see cref="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" /> class.</summary>
</Docs>
</MemberGroup>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public WindowsFormsApplicationBase ();" />
<MemberSignature Language="ILAsm" Value=".method public specialname rtspecialname instance void .ctor() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.#ctor" />
<MemberSignature Language="VB.NET" Value="Public Sub New ()" />
<MemberSignature Language="C++ CLI" Value="public:
 WindowsFormsApplicationBase();" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<Parameters />
<Docs>
<summary>Initializes a new instance of the <see cref="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" /> class.</summary>
<remarks>To be added.</remarks>
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public WindowsFormsApplicationBase (Microsoft.VisualBasic.ApplicationServices.AuthenticationMode authenticationMode);" />
<MemberSignature Language="ILAsm" Value=".method public specialname rtspecialname instance void .ctor(valuetype Microsoft.VisualBasic.ApplicationServices.AuthenticationMode authenticationMode) cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.#ctor(Microsoft.VisualBasic.ApplicationServices.AuthenticationMode)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (authenticationMode As AuthenticationMode)" />
<MemberSignature Language="F#" Value="new Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase : Microsoft.VisualBasic.ApplicationServices.AuthenticationMode -> Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" Usage="new Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase authenticationMode" />
<MemberSignature Language="C++ CLI" Value="public:
 WindowsFormsApplicationBase(Microsoft::VisualBasic::ApplicationServices::AuthenticationMode authenticationMode);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.Security.SecuritySafeCritical]</AttributeName>
<AttributeName Language="F#">[<System.Security.SecuritySafeCritical>]</AttributeName>
</Attribute>
</Attributes>
<Parameters>
<Parameter Name="authenticationMode" Type="Microsoft.VisualBasic.ApplicationServices.AuthenticationMode" />
</Parameters>
<Docs>
<param name="authenticationMode">One of the enumeration values that specifies the application's authentication mode.</param>
<summary>Initializes a new instance of the <see cref="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" /> class with the specified authentication mode.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If the `authenticationMode` parameter is the <xref:Microsoft.VisualBasic.ApplicationServices.AuthenticationMode.Windows> enumeration value, then this constructor attempts to set the current thread's <xref:System.Threading.Thread.CurrentPrincipal%2A> property to the <xref:System.Security.Principal.WindowsPrincipal> for the current user.
If the `authenticationMode` parameter is the <xref:Microsoft.VisualBasic.ApplicationServices.AuthenticationMode.ApplicationDefined> enumeration value, then this constructor leaves the current thread's <xref:System.Threading.Thread.CurrentPrincipal%2A> property unchanged.
]]></format>
</remarks>
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="ApplicationContext">
<MemberSignature Language="C#" Value="public System.Windows.Forms.ApplicationContext ApplicationContext { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance class System.Windows.Forms.ApplicationContext ApplicationContext" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ApplicationContext" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property ApplicationContext As ApplicationContext" />
<MemberSignature Language="F#" Value="member this.ApplicationContext : System.Windows.Forms.ApplicationContext" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ApplicationContext" />
<MemberSignature Language="C++ CLI" Value="public:
 property System::Windows::Forms::ApplicationContext ^ ApplicationContext { System::Windows::Forms::ApplicationContext ^ get(); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Windows.Forms.ApplicationContext</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the <see cref="T:System.Windows.Forms.ApplicationContext" /> object for the current thread of a Windows Forms application.</summary>
<value>Contextual information about the current thread.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This is an advanced member; it does not appear in IntelliSense unless you click the **All** tab.
## Availability by Project Type
|Project type|Available|
|-|-|
|Windows Forms Application|**Yes**|
|Class Library|No|
|Console Application|No|
|Windows Forms Control Library|No|
|Web Control Library|No|
|Windows Service|No|
|Web Site|No|
]]></format>
</remarks>
<altmember cref="T:System.Windows.Forms.ApplicationContext" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="ApplyApplicationDefaults">
<MemberSignature Language="C#" Value="public event Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventHandler ApplyApplicationDefaults;" />
<MemberSignature Language="ILAsm" Value=".event class Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventHandler ApplyApplicationDefaults" />
<MemberSignature Language="DocId" Value="E:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ApplyApplicationDefaults" />
<MemberSignature Language="VB.NET" Value="Public Event ApplyApplicationDefaults As ApplyApplicationDefaultsEventHandler " />
<MemberSignature Language="F#" Value="member this.ApplyApplicationDefaults : Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventHandler " Usage="member this.ApplyApplicationDefaults : Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventHandler " />
<MemberSignature Language="C++ CLI" Value="public:
 event Microsoft::VisualBasic::ApplicationServices::ApplyApplicationDefaultsEventHandler ^ ApplyApplicationDefaults;" />
<MemberType>Event</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>Microsoft.VisualBasic.ApplicationServices.ApplyApplicationDefaultsEventHandler</ReturnType>
</ReturnValue>
<Docs>
<summary>Occurs when the application is ready to accept default values for various application areas.</summary>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="ColorMode">
<MemberSignature Language="C#" Value="protected System.Windows.Forms.SystemColorMode ColorMode { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.Windows.Forms.SystemColorMode ColorMode" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ColorMode" />
<MemberSignature Language="VB.NET" Value="Protected Property ColorMode As SystemColorMode" />
<MemberSignature Language="F#" Value="member this.ColorMode : System.Windows.Forms.SystemColorMode with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ColorMode" />
<MemberSignature Language="C++ CLI" Value="protected:
 property System::Windows::Forms::SystemColorMode ColorMode { System::Windows::Forms::SystemColorMode get(); void set(System::Windows::Forms::SystemColorMode value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="windowsdesktop-9.0">
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="windowsdesktop-9.0">
<AttributeName Language="C#">[System.Diagnostics.CodeAnalysis.Experimental("WFO5001", UrlFormat="https://aka.ms/winforms-experimental/{0}")]</AttributeName>
<AttributeName Language="F#">[<System.Diagnostics.CodeAnalysis.Experimental("WFO5001", UrlFormat="https://aka.ms/winforms-experimental/{0}")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Windows.Forms.SystemColorMode</ReturnType>
</ReturnValue>
<Docs>
<summary>To be added.</summary>
<value>To be added.</value>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="DoEvents">
<MemberSignature Language="C#" Value="public void DoEvents ();" />
<MemberSignature Language="ILAsm" Value=".method public instance void DoEvents() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoEvents" />
<MemberSignature Language="VB.NET" Value="Public Sub DoEvents ()" />
<MemberSignature Language="F#" Value="member this.DoEvents : unit -> unit" Usage="windowsFormsApplicationBase.DoEvents " />
<MemberSignature Language="C++ CLI" Value="public:
 void DoEvents();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Processes all Windows messages currently in the message queue.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `My.Application.DoEvents` method allows your application to handle other events that might be raised while you code runs. The `My.Application.DoEvents` method has the same behavior as the <xref:System.Windows.Forms.Application.DoEvents%2A> method.
When you run a Windows Forms application, it creates a new form, which then waits for events to be handled. Each time the form handles an event, such as a button click, it processes all the code associated with that event. All other events wait in the queue. While your code handles the event, your application does not respond. For example, the window does not repaint if another window is dragged on top.
If you call `My.Application.DoEvents` in your code, your application can handle the other events. For example, if your code adds data to a <xref:System.Windows.Forms.ListBox> in a loop, and after each step of the loop it calls `My.Application.DoEvents`, your form repaints when another window is dragged over it. If you remove `My.Application.DoEvents` from your code, your form will not repaint until the click event handler of the button is finished executing.
Typically, you use this method in a loop to process messages.
> [!NOTE]
> The `My.Application.DoEvents` method does not process events in exactly the same way as the form does. Use multithreading to make the form directly handle the events. For more information, see [Using threads and threading](/dotnet/standard/threading/using-threads-and-threading).
> [!CAUTION]
> If a method that handles a user interface (UI) event calls the `My.Application.DoEvents` method, the method might be re-entered before it finishes. This can happen because the `My.Application.DoEvents` method processes Windows messages, and Windows messages can raise events.
The following table lists an example of a task involving the `My.Application.DoEvents` method.
|To|See|
|-|-|
|Allow a form to respond to UI input while busy|[Walkthrough: Handling Events](/dotnet/visual-basic/programming-guide/language-features/events/walkthrough-handling-events)|
## Availability by Project Type
|Project type|Available|
|-|-|
|Windows Forms Application|**Yes**|
|Class Library|No|
|Console Application|No|
|Windows Forms Control Library|No|
|Web Control Library|No|
|Windows Service|No|
|Web Site|No|
## Examples
This example uses the `My.Application.DoEvents` method to allow the UI for `TextBox1` to update.
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrMyApplication/VB/Form1.vb" id="Snippet6":::
This code should be in a form that has a `TextBox1` component with a `Text` property.
]]></format>
</remarks>
<altmember cref="M:System.Windows.Forms.Application.DoEvents" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="EnableVisualStyles">
<MemberSignature Language="C#" Value="protected bool EnableVisualStyles { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance bool EnableVisualStyles" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.EnableVisualStyles" />
<MemberSignature Language="VB.NET" Value="Protected Property EnableVisualStyles As Boolean" />
<MemberSignature Language="F#" Value="member this.EnableVisualStyles : bool with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.EnableVisualStyles" />
<MemberSignature Language="C++ CLI" Value="protected:
 property bool EnableVisualStyles { bool get(); void set(bool value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Docs>
<summary>Determines whether this application will use the Windows XP styles for windows, controls, and so on.</summary>
<value>A <see cref="T:System.Boolean" /> value that indicates whether this application will use the XP Windows styles for windows, controls, and so on.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize%2A> method uses this property to determine whether to call <xref:System.Windows.Forms.Application.EnableVisualStyles%2A>.
]]></format>
</remarks>
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize(System.Collections.ObjectModel.ReadOnlyCollection{System.String})" />
<altmember cref="M:System.Windows.Forms.Application.EnableVisualStyles" />
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="HideSplashScreen">
<MemberSignature Language="C#" Value="protected void HideSplashScreen ();" />
<MemberSignature Language="ILAsm" Value=".method familyinstance void HideSplashScreen() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.HideSplashScreen" />
<MemberSignature Language="VB.NET" Value="Protected Sub HideSplashScreen ()" />
<MemberSignature Language="F#" Value="member this.HideSplashScreen : unit -> unit" Usage="windowsFormsApplicationBase.HideSplashScreen " />
<MemberSignature Language="C++ CLI" Value="protected:
 void HideSplashScreen();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.Security.SecuritySafeCritical]</AttributeName>
<AttributeName Language="F#">[<System.Security.SecuritySafeCritical>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Hides the application's splash screen.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase> class creates the splash screen on a separate thread. This method marshals the call to the correct thread.
This method is called when the main form is done loading.
]]></format>
</remarks>
<altmember cref="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MinimumSplashScreenDisplayTime" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ShowSplashScreen" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen" />
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="HighDpiMode">
<MemberSignature Language="C#" Value="protected System.Windows.Forms.HighDpiMode HighDpiMode { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.Windows.Forms.HighDpiMode HighDpiMode" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.HighDpiMode" />
<MemberSignature Language="VB.NET" Value="Protected Property HighDpiMode As HighDpiMode" />
<MemberSignature Language="F#" Value="member this.HighDpiMode : System.Windows.Forms.HighDpiMode with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.HighDpiMode" />
<MemberSignature Language="C++ CLI" Value="protected:
 property System::Windows::Forms::HighDpiMode HighDpiMode { System::Windows::Forms::HighDpiMode get(); void set(System::Windows::Forms::HighDpiMode value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="windowsdesktop-6.0;windowsdesktop-7.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Windows.Forms.HighDpiMode</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets the HighDpiMode for the application.</summary>
<value>To be added.</value>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="IsSingleInstance">
<MemberSignature Language="C#" Value="protected bool IsSingleInstance { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance bool IsSingleInstance" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.IsSingleInstance" />
<MemberSignature Language="VB.NET" Value="Protected Property IsSingleInstance As Boolean" />
<MemberSignature Language="F#" Value="member this.IsSingleInstance : bool with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.IsSingleInstance" />
<MemberSignature Language="C++ CLI" Value="protected:
 property bool IsSingleInstance { bool get(); void set(bool value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets a value that indicates whether this application is a single-instance application.</summary>
<value>
<see langword="True" /> to indicate this application is a single-instance application; otherwise, <see langword="False" />.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run%2A> method uses this property to determine whether this application is a single-instance application.
]]></format>
</remarks>
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(System.String[])" />
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="MainForm">
<MemberSignature Language="C#" Value="protected System.Windows.Forms.Form MainForm { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance class System.Windows.Forms.Form MainForm" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MainForm" />
<MemberSignature Language="VB.NET" Value="Protected Property MainForm As Form" />
<MemberSignature Language="F#" Value="member this.MainForm : System.Windows.Forms.Form with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MainForm" />
<MemberSignature Language="C++ CLI" Value="protected:
 property System::Windows::Forms::Form ^ MainForm { System::Windows::Forms::Form ^ get(); void set(System::Windows::Forms::Form ^ value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.Form</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets the main form for this application.</summary>
<value>The main form for this application.</value>
<remarks>
<format type="text/markdown"><.
The changes to this property are not persisted when the application closes. To change the main form permanently, you must change the setting in the **Project Designer**.
]]></format>
</remarks>
<altmember cref="T:System.Windows.Forms.Form" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="MinimumSplashScreenDisplayTime">
<MemberSignature Language="C#" Value="public int MinimumSplashScreenDisplayTime { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance int32 MinimumSplashScreenDisplayTime" />
<MemberSignature Language="DocId" Value="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MinimumSplashScreenDisplayTime" />
<MemberSignature Language="VB.NET" Value="Public Property MinimumSplashScreenDisplayTime As Integer" />
<MemberSignature Language="F#" Value="member this.MinimumSplashScreenDisplayTime : int with get, set" Usage="Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MinimumSplashScreenDisplayTime" />
<MemberSignature Language="C++ CLI" Value="public:
 property int MinimumSplashScreenDisplayTime { int get(); void set(int value); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<set: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="windowsdesktop-6.0;windowsdesktop-7.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets the minimum length of time, in milliseconds, for which the splash screen is displayed.</summary>
<value>The minimum length of time, in milliseconds, for which the splash screen is displayed.</value>
<remarks>
<format type="text/markdown"><.
You should set the `My.Application.MinimumSplashScreenDisplayTime` property in a method that overrides the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize%2A> or <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen%2A> method. Code that overrides methods of the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase> class should be entered in the ApplicationEvents.vb file, which is hidden by default.
To access the Code Editor window for overriding members:
1. With a project selected in **Solution Explorer**, click **Properties** on the **Project** menu.
2. Click the **Application** tab.
3. Click the **View Application Events** button to open the Code Editor.
For more information, see [Application Page, Project Designer (Visual Basic)](https://learn.microsoft.com/visualstudio/ide/reference/application-page-project-designer-visual-basic).
## Availability by Project Type
|Project type|Available|
|-|-|
|Windows Forms Application|**Yes**|
|Class Library|No|
|Console Application|No|
|Windows Forms Control Library|No|
|Web Control Library|No|
|Windows Service|No|
|Web Site|No|
## Examples
This example demonstrates how to set the `My.Application.MinimumSplashScreenDisplayTime` property by overriding the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize%2A> property.
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrMyApplication/VB/FakeMyEvents.vb" id="Snippet51":::
This example requires that the project have a splash screen.
You must enter this code in the Code Editor window for application events. For more information, see [Application Page, Project Designer (Visual Basic)](https://learn.microsoft.com/visualstudio/ide/reference/application-page-project-designer-visual-basic).
]]></format>
</remarks>
<altmember cref="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.SplashScreen" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize(System.Collections.ObjectModel.ReadOnlyCollection{System.String})" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen" />
<altmember cref="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="NetworkAvailabilityChanged">
<MemberSignature Language="C#" Value="public event Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler NetworkAvailabilityChanged;" />
<MemberSignature Language="ILAsm" Value=".event class Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler NetworkAvailabilityChanged" />
<MemberSignature Language="DocId" Value="E:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.NetworkAvailabilityChanged" />
<MemberSignature Language="VB.NET" Value="Public Custom Event NetworkAvailabilityChanged As NetworkAvailableEventHandler " />
<MemberSignature Language="F#" Value="member this.NetworkAvailabilityChanged : Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler " Usage="member this.NetworkAvailabilityChanged : Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler " />
<MemberSignature Language="C++ CLI" Value="public:
 event Microsoft::VisualBasic::Devices::NetworkAvailableEventHandler ^ NetworkAvailabilityChanged;" />
<MemberType>Event</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler</ReturnType>
</ReturnValue>
<Docs>
<summary>Occurs when the network availability changes.</summary>
<remarks>
<format type="text/markdown"><.
> [!NOTE]
> Many network hubs will provide a network connection even if the hub is disconnected from a larger network. Consequently, for wired connections, this event indicates change in the connection between the computer and a hub.
## Availability by Project Type
|Project type|Available|
|-|-|
|Windows Forms Application|**Yes**|
|Class Library|No|
|Console Application|No|
|Windows Forms Control Library|No|
|Web Control Library|No|
|Windows Service|No|
|Web Site|No|
## Examples
This example calls the `SetConnectionStatus` method of the default `Form1` class when the network availability changes.
You must enter the code in the Code Editor window for application events. To access this window, follow the instructions from this topic's Remarks section.
The project should have a form named `Form1`. It should have a method named `SetConnectionStatus` that takes a `Boolean` parameter.
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrMyApplication/VB/FakeMyEvents.vb" id="Snippet9":::
]]></format>
</remarks>
<altmember cref="T:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase" />
<altmember cref="N:Microsoft.VisualBasic.ApplicationServices" />
<altmember cref="T:Microsoft.VisualBasic.Devices.NetworkAvailableEventHandler" />
<altmember cref="E:Microsoft.VisualBasic.Devices.Network.NetworkAvailabilityChanged" />
<altmember cref="T:Microsoft.VisualBasic.Devices.NetworkAvailableEventArgs" />
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="OnCreateMainForm">
<MemberSignature Language="C#" Value="protected virtual void OnCreateMainForm ();" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance void OnCreateMainForm() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateMainForm" />
<MemberSignature Language="VB.NET" Value="Protected Overridable Sub OnCreateMainForm ()" />
<MemberSignature Language="F#" Value="abstract member OnCreateMainForm : unit -> unit
override this.OnCreateMainForm : unit -> unit" Usage="windowsFormsApplicationBase.OnCreateMainForm " />
<MemberSignature Language="C++ CLI" Value="protected:
 virtual void OnCreateMainForm();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>When overridden in a derived class, allows a designer to emit code that configures the splash screen and main form.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, this method does nothing. However, when you select a main form for your application in the Visual Basic **Project Designer**, the designer overrides this method with a method that sets the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MainForm%2A> property to a new instance of the main form.
This method is called by the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun%2A> method.
]]></format>
</remarks>
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="OnCreateSplashScreen">
<MemberSignature Language="C#" Value="protected virtual void OnCreateSplashScreen ();" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance void OnCreateSplashScreen() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen" />
<MemberSignature Language="VB.NET" Value="Protected Overridable Sub OnCreateSplashScreen ()" />
<MemberSignature Language="F#" Value="abstract member OnCreateSplashScreen : unit -> unit
override this.OnCreateSplashScreen : unit -> unit" Usage="windowsFormsApplicationBase.OnCreateSplashScreen " />
<MemberSignature Language="C++ CLI" Value="protected:
 virtual void OnCreateSplashScreen();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>When overridden in a derived class, allows a designer to emit code that initializes the splash screen.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, this method does nothing. If you select a splash screen for your application in the Visual Basic **Project Designer**, the designer overrides the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen%2A> method with a method that sets the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.SplashScreen%2A> property to a new instance of the splash-screen form.
This method is called by the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize%2A> method.
]]></format>
</remarks>
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="OnInitialize">
<MemberSignature Language="C#" Value="protected virtual bool OnInitialize (System.Collections.ObjectModel.ReadOnlyCollection<string> commandLineArgs);" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance bool OnInitialize(class System.Collections.ObjectModel.ReadOnlyCollection`1<string> commandLineArgs) cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnInitialize(System.Collections.ObjectModel.ReadOnlyCollection{System.String})" />
<MemberSignature Language="VB.NET" Value="Protected Overridable Function OnInitialize (commandLineArgs As ReadOnlyCollection(Of String)) As Boolean" />
<MemberSignature Language="F#" Value="abstract member OnInitialize : System.Collections.ObjectModel.ReadOnlyCollection<string> -> bool
override this.OnInitialize : System.Collections.ObjectModel.ReadOnlyCollection<string> -> bool" Usage="windowsFormsApplicationBase.OnInitialize commandLineArgs" />
<MemberSignature Language="C++ CLI" Value="protected:
 virtual bool OnInitialize(System::Collections::ObjectModel::ReadOnlyCollection<System::String ^> ^ commandLineArgs);" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
<Attribute>
<AttributeName Language="C#">[System.STAThread]</AttributeName>
<AttributeName Language="F#">[<System.STAThread>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="commandLineArgs" Type="System.Collections.ObjectModel.ReadOnlyCollection<System.String>" />
</Parameters>
<Docs>
<param name="commandLineArgs">A read-only collection containing the command-line arguments as strings for the current application.</param>
<summary>Sets the visual styles, text display styles, and current principal for the main application thread (if the application uses Windows authentication), and initializes the splash screen, if defined.</summary>
<returns>A <see cref="T:System.Boolean" /> indicating if application startup should continue.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, this method sets the visual styles, text display styles, and current principal for the main application thread (if the application uses Windows authentication), and calls `ShowSplashScreen` if neither `/nosplash` nor `-nosplash` is used as a command-line argument.
This method calls the following methods:
- <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ShowSplashScreen%2A>.
- <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen%2A>.
]]></format>
</remarks>
<altmember cref="P:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.EnableVisualStyles" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.ShowSplashScreen" />
<altmember cref="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateSplashScreen" />
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="OnRun">
<MemberSignature Language="C#" Value="protected virtual void OnRun ();" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance void OnRun() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun" />
<MemberSignature Language="VB.NET" Value="Protected Overridable Sub OnRun ()" />
<MemberSignature Language="F#" Value="abstract member OnRun : unit -> unit
override this.OnRun : unit -> unit" Usage="windowsFormsApplicationBase.OnRun " />
<MemberSignature Language="C++ CLI" Value="protected:
 virtual void OnRun();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.Security.SecuritySafeCritical]</AttributeName>
<AttributeName Language="F#">[<System.Security.SecuritySafeCritical>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Provides the starting point for when the main application is ready to start running, after the initialization is done.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, before it enters the Windows Forms message loop, this method calls the `OnCreateMainForm` (to create the application's main form) and `HideSplashScreen` (to close the splash screen) methods:
- <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateMainForm%2A>. Provides a way for a designer to emit code that initializes the main form.
By default, this method does nothing. However, when you select a main form for your application in the Visual Basic **Project Designer**, the designer overrides the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnCreateMainForm%2A> method with a method that sets the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.MainForm%2A> property to a new instance of the main form.
- <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.HideSplashScreen%2A>. If the application has a splash screen defined and it is open, this method closes the splash screen.
By default, this method closes the splash screen.
]]></format>
</remarks>
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
</Docs>
</Member>
<Member MemberName="OnShutdown">
<MemberSignature Language="C#" Value="protected virtual void OnShutdown ();" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance void OnShutdown() cil managed" />
<MemberSignature Language="DocId" Value="M:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnShutdown" />
<MemberSignature Language="VB.NET" Value="Protected Overridable Sub OnShutdown ()" />
<MemberSignature Language="F#" Value="abstract member OnShutdown : unit -> unit
override this.OnShutdown : unit -> unit" Usage="windowsFormsApplicationBase.OnShutdown " />
<MemberSignature Language="C++ CLI" Value="protected:
 virtual void OnShutdown();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic</AssemblyName>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>Microsoft.VisualBasic.Forms</AssemblyName>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>When overridden in a derived class, allows for code to run when the application shuts down.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This method does not run if an unhandled exception occurs in the main application.
By default, this method raises the <xref:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Shutdown> event.
]]></format>
</remarks>
<related type="Article" href="/dotnet/visual-basic/developing-apps/customizing-extending-my/extending-the-visual-basic-application-model">Extending the Visual Basic Application Model</related>
<related type="Article" href="/dotnet/visual-basic/language-reference/objects/">Objects (Visual Basic)</related>
</Docs>
</Member>
<Member MemberName="OnStartup">
<MemberSignature Language="C#" Value="protected virtual bool OnStartup (Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs);" />
<MemberSignature Language="ILAsm" Value=".method familynewslot virtual instance bool OnStartup(class Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs) cil managed" />