Determin menu bar height dynamically.

Minor sample changes.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17405 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dialogs/dialogs.cpp

@@ -851,6 +851,12 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event) )
     dc.SetTextForeground(wxGetApp().m_canvasTextColour);
     dc.SetBackgroundMode(wxTRANSPARENT);
     dc.DrawText("wxWindows common dialogs test application", 10, 10);
+    
+    dc.SetPen( *wxRED_PEN );
+    dc.DrawLine( 10,40,200,40 );
+    
+    dc.SetPen( *wxBLACK_PEN );
+    dc.DrawLine( 10,50,200,50 );
 }
 
 // ----------------------------------------------------------------------------