What is the best option to close a dialog based application (Exit) !?

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Hello,
I want to know what is the best option to close a dialog based application, because I am really confused about these options:

C++

SendMessage(WM_CLOSE);
PostMessage(WM_CLOSE);
DestroyWindow();
OnOK();
OnCancel();
PostQuitMessage(0);

or whatever else...

Thank you for your understanding.

Posted 11-Dec-12 4:42am

Mr. Tomay

Updated 11-Dec-12 4:43am

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Pascal-78 · Accepted Answer · 2012-12-11T05:07:00

It depend on where you are in the application :

in the main dialog, you can use :

C++

EndDialog(code)

in an other modal dialog, you should use the returned value of the DoModal method to stop or not your application when you are back in a main dialog method.

C++

void CMainDialog::OnButtonClick()
{
  CSubDialog dlg;
  if(dlg.DoModal()==IDOK)
    EndDialog(IDOK);
}

in a modeless dialog, post a specific message to your main dialog and do action in it.

C++

// To Insert in message handlers
ON_MESSAGE(WM_USER,CMainDialog::OnUserMessage)
// To post the message: AfxGetMainWnd()->PostMessage(WM_USER);

LRESULT CMainDialog::OnUserMessage(WPARAM wParam, LPARAM lParam)
{
  // To do: CleanUp
  
  EndDialog(IDOK);
}