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Invoke Native Methods with DllImport
rollynoel edited this page Jun 13, 2013
·
2 revisions
Added by dholton dholton
Here are some samples:
import System.Runtime.InteropServices
[DllImport("user32.dll")]
def MessageBeep(n as uint) as int:
pass
def beep():
MessageBeep(0)
beep()
Actually, a more cross-platform way to make a beep sound is to call Microsoft.VisualBasic.Interaction.Beep() (add a reference to the Microsoft.VisualBasic.dll in the GAC or do "import Microsoft.VisualBasic from Microsoft.VisualBasic"). This is supported in both .NET and Mono.
import System.Runtime.InteropServices
[DllImport("msvcrt.dll")]
def puts (c as string) as int:
pass
[DllImport("msvcrt.dll")]
def _flushall () as int:
pass
puts("testing...")
_flushall()
Here is another example with the EntryPoint specified as a named parameter. Useful I guess if you want to use a different name for the dll call.
import System.Runtime.InteropServices
[DllImport("User32.dll", EntryPoint:"MessageBox")]
def msgbox(hwnd as int, msg as string, caption as string, msgtype as int):
pass
def msgbox(msg as string):
msgbox(0,msg,"Message",0)
msgbox(0, "MessageDialog called", "DllImport Demo", 0)
msgbox("one more time")
For further information, see: