- HWND hWnd = 0;
- if (m_parent) hWnd = (HWND) m_parent->GetHWND();
- unsigned int msStyle = MB_OK;
- if (m_dialogStyle & wxYES_NO)
- {
- if (m_dialogStyle & wxCANCEL)
- msStyle = MB_YESNOCANCEL;
- else
- msStyle = MB_YESNO;
+ wxWindow *winTop = wxTheApp->GetTopWindow();
+ if ( !winTop )
+ {
+ // when the message box is shown from wxApp::OnInit() (i.e. before the
+ // message loop is entered), this must be done or the next message box
+ // will never be shown - just try putting 2 calls to wxMessageBox() in
+ // OnInit() to see it
+ while ( wxTheApp->Pending() )
+ wxTheApp->Dispatch();
+ }
+
+ // use the top level window as parent if none specified
+ HWND hWnd = 0;
+ if ( m_parent )
+ hWnd = GetHwndOf(m_parent);
+ else if ( winTop )
+ hWnd = GetHwndOf(winTop);
+
+ // translate wx style in MSW
+ unsigned int msStyle = MB_OK;
+ if (m_dialogStyle & wxYES_NO)
+ {
+ if (m_dialogStyle & wxCANCEL)
+ msStyle = MB_YESNOCANCEL;
+ else
+ msStyle = MB_YESNO;