Reopen modal dialog in MFC

Question

I need to open a dialog box instantiated from the same class twice. When I try this

CdelmeDlg dlg;
dlg.DoModal();
dlg.DoModal();

The second call opens the dialog only for a split second, then it is closed. My bet was there is a leftover message in the message queue, so I added this in between the calls

MSG msgCur;
while (::PeekMessage(&msgCur, NULL, NULL, NULL, PM_REMOVE))
    ;

This solves the problem, but it feels like a wrong kind of thing to do. Is there a way to process the leftover message properly?

Answer 1

Don't call EndDialog( IDOK );

To handle the ok or cancel buttons being pressed just inherit OnOk or OnCancel ... Otherwise EndDialog is going to be called twice and you'll get the problem you are getting!