Disable the close X in a dialog box

[Rich Peters]

Does anyone know how to disable the close x in the upper right corner? I havent found any information on this

thanks

Rich

[Howard Birkett]

You could simply override OnCancel() to do nothing.

Howard

[Rich Peters]

I guess I left something out... This is a modeless dialog and OnCancel doesnt seem to get called if you click on the X. I have a busy state where a thread has to be shut down before exiting.

[Mike Harnad]

Try trapping WM_CLOSE (OnClose).

[cwarez]

Put in a handler for WM_CLOSE
and do not call the default base class handler.

All replies are good. But without gray the X button, the app won't look professional. The function DrawFrameControl() may help.

xiaolong wu

Put this into yoour dialogs OnInitDialog function...

CMenu* sysMenu = this->GetSystemMenu(FALSE);
sysMenu->EnableMenuItem(SC_CLOSE, MF_GRAYED);

[Saeed R]

How about disabling the Title bar check box on the dialog property...(system menu)... so all you would have is the dialogue without anything on top

[Rich Peters]

Thanks, it works like a charm...