Controlling behavior of Close Box on caption bar

[John Neubauer]

I'm using a dialog for multiple purposes. To distinguish them for the user I place an appropriate icon on the caption bar. To do this I must include %WS_SYSMENU in the template and this activates the CLOSE button. I want to disable this button and the CLOSE option in the system menu. All user response is then placed in one CANCEL button in the dialog. How do I get the ID of the close box so that I can disable it?

Thanx,

John Neubauer

I may have found the answer in a FAQ.

[Kev Peel]

Instead of disabling the button, how about trapping WM_SYSCOMMAND/SC_CLOSE in the callback and then triggering the cancel button code, using either GOTO or by sending BM_CLICK:

         Case %WM_SYSCOMMAND
             If (wParam And &HFFF0) = %SC_CLOSE Then
 
                 ' MUST return TRUE to stop the dialog being destroyed...
                 Function = %TRUE
 
                 ' Call the shutdown code using GOTO...
                 GOTO MyShutDown:
 
                 ' OR, shutdown using the cancel button...
                 CONTROL SEND CBHNDL, %IDCANCEL, %BM_CLICK, 0, 0
 
                 Exit Function
              End If

[Lee Bergeron]

This will DISABLE the close "X"

DeleteMenu GetSystemMenu(hWnd,BYVAL 0),%SC_CLOSE,%MF_BYCOMMAND

[Michael Mattias]

DeleteMenu deletes, not disables.

EnableMenuItem enables or disables.

Whic to use depends on your preference: do you want the user to see the familiar System menu, but with "Close" greyed out and not selectable? Or would you prefer to have him see a menu which does not include a greyed-out "Close?"