diff --git a/examples/tvdemo/fileview.cpp b/examples/tvdemo/fileview.cpp
index b8473a80..713b169c 100644
--- a/examples/tvdemo/fileview.cpp
+++ b/examples/tvdemo/fileview.cpp
@@ -30,7 +30,6 @@ __link(RScrollBar)
 #include <stdlib.h>
 #include <ctype.h>
 
-#include <strstrea.h>
 #include <fstream.h>
 
 #include "tvcmds.h"
@@ -93,10 +92,7 @@ void TFileViewer::readFile( const char *fName )
     ifstream fileToView( fName );
     if( !fileToView )
         {
-        char buf[256] = {0};
-        ostrstream os( buf, sizeof( buf )-1 );
-        os << "Failed to open file '" << fName << "'." << ends;
-        messageBox( buf, mfError | mfOKButton );
+        messageBox( mfError | mfOKButton, "Failed to open file '%s'.", fName );
         isValid = False;
         }
     else
diff --git a/examples/tvforms/fields.cpp b/examples/tvforms/fields.cpp
index cc624327..f601aad6 100755
--- a/examples/tvforms/fields.cpp
+++ b/examples/tvforms/fields.cpp
@@ -31,11 +31,6 @@ __link( RInputLine )
 #include <stdlib.h>
 #endif  // __STDLIB_H
 
-#if !defined( __STRSTREAM_H )
-#include <strstrea.h>
-#endif  // __STRSTREAM_H
-
-
 // TKeyInputLine
 
 const char *const TKeyInputLine::name = "TKeyInputLine";
@@ -137,8 +132,6 @@ Boolean TNumInputLine::valid( ushort command )
 {
     int32_t value;
     Boolean ok;
-    char msg[80];
-    ostrstream os(msg, 80);
 
     ok = True;
     if ( (command != cmCancel) && (command != cmValid) )
@@ -149,8 +142,7 @@ Boolean TNumInputLine::valid( ushort command )
         if ( (value == 0) || (value < min) || (value > max) )
             {
             select();
-            os << "Number must be from " << min << " to " << max << "." << ends;
-            messageBox(os.str(), mfError + mfOKButton);
+            messageBox(mfError | mfOKButton, "Number must be from %ld to %ld.", (long) min, (long) max);
             selectAll(True);
             ok = False;
             }
diff --git a/examples/tvforms/genparts.h b/examples/tvforms/genparts.h
index ab1126bd..cf1b5e7b 100755
--- a/examples/tvforms/genparts.h
+++ b/examples/tvforms/genparts.h
@@ -129,7 +129,7 @@ TForm *makeForm()
     y = 2;
 
     r = TRect(inputCol, y, inputCol + partNumWidth + 2, y + 1);
-    c = new TNumInputLine(r, partNumWidth, 0, 9999);
+    c = new TNumInputLine(r, partNumWidth, 1, 9999);
     f->insert(c);
 
     r = TRect(labelCol, y, labelCol + labelWid, y + 1);
diff --git a/source/tvision/tchdrdlg.cpp b/source/tvision/tchdrdlg.cpp
index 70f90a0c..57f01896 100644
--- a/source/tvision/tchdrdlg.cpp
+++ b/source/tvision/tchdrdlg.cpp
@@ -37,10 +37,6 @@
 #include <string.h>
 #endif  // __STRING_H
 
-#if !defined( __STRSTREAM_H )
-#include <strstrea.h>
-#endif
-
 TChDirDialog::TChDirDialog( ushort opts, ushort histId ) noexcept :
     TWindowInit( &TChDirDialog::initFrame ),
     TDialog( TRect( 16, 2, 64, 20 ), changeDirTitle )
@@ -215,11 +211,7 @@ Boolean TChDirDialog::valid( ushort command )
 
     if( changeDir( path ) != 0 )
         {
-        char buf[256];
-        ostrstream os( buf, sizeof( buf )-1 );
-        os << invalidText << ": '" << path << "'." << ends;
-        buf[sizeof( buf )-1] = '\0';
-        messageBox( buf, mfError | mfOKButton );
+        messageBox( mfError | mfOKButton, "%s: '%s'.", invalidText, path );
         return False;
         }
     return True;
diff --git a/source/tvision/tdirlist.cpp b/source/tvision/tdirlist.cpp
index f0428d74..8216c9c1 100644
--- a/source/tvision/tdirlist.cpp
+++ b/source/tvision/tdirlist.cpp
@@ -47,8 +47,7 @@ TDirListBox::~TDirListBox()
 
 void TDirListBox::getText( char *text, short item, short maxChars )
 {
-    strncpy( text, list()->at(item)->text(), maxChars );
-    text[maxChars] = '\0';
+    strnzcpy( text, list()->at(item)->text(), maxChars + 1 );
 }
 
 void TDirListBox::selectItem( short item )
@@ -56,21 +55,6 @@ void TDirListBox::selectItem( short item )
     message( owner, evCommand, cmChangeDir, list()->at(item) );
 }
 
-/*
-void TDirListBox::handleEvent( TEvent& event )
-{
-    if( event.what == evMouseDown && (event.mouse.eventFlags & meDoubleClick) )
-        {
-        event.what = evCommand;
-        event.message.command = cmChangeDir;
-        putEvent( event );
-        clearEvent( event );
-        }
-    else
-       TListBox::handleEvent( event );
-}
-*/
-
 Boolean TDirListBox::isSelected( short item )
 {
     return Boolean( item == cur );
diff --git a/source/tvision/tfildlg.cpp b/source/tvision/tfildlg.cpp
index 799a14db..580d8797 100644
--- a/source/tvision/tfildlg.cpp
+++ b/source/tvision/tfildlg.cpp
@@ -48,10 +48,6 @@
 #include <string.h>
 #endif  // __STRING_H
 
-#if !defined( __STRSTREAM_H )
-#include <strstrea.h>
-#endif
-
 TFileDialog::TFileDialog( TStringView aWildCard,
                           TStringView aTitle,
                           TStringView inputName,
@@ -288,11 +284,7 @@ Boolean TFileDialog::checkDirectory( const char *str )
         return True;
     else
         {
-        char buf[256];
-        ostrstream os( buf, sizeof( buf )-1 );
-        os << invalidDriveText << ": '" << str << "'" << ends;
-        buf[sizeof( buf )-1] = '\0';
-        messageBox( buf, mfError | mfOKButton );
+        messageBox( mfError | mfOKButton, "%s: '%s'", invalidDriveText, str );
         fileName->select();
         return False;
         }
@@ -348,11 +340,7 @@ char ext[MAXEXT];
                 return True;
             else
                 {
-                char buf[256];
-                ostrstream os( buf, sizeof( buf )-1 );
-                os << invalidFileText << ": '" << fName << "'" << ends;
-                buf[sizeof( buf )-1] = '\0';
-                messageBox( buf, mfError | mfOKButton );
+                messageBox( mfError | mfOKButton, "%s: '%s'", invalidFileText, fName );
                 return False;
                 }
             }