Added wxSafeYield(wxWindow *win=NULL).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1949 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/utils.h

@@ -171,6 +171,9 @@ WXDLLEXPORT int wxFindMenuItemId(wxFrame *frame, const wxString& menuString, con
 // Yield to other apps/messages
 WXDLLEXPORT bool wxYield();
 
+// Yield to other apps/messages and disable user input
+WXDLLEXPORT bool wxSafeYield(wxWindow *win = NULL);
+
 // Format a message on the standard error (UNIX) or the debugging
 // stream (Windows)
 WXDLLEXPORT void wxDebugMsg(const char *fmt ...) ;