Application quitting - what about HotKeys?

[John Montenigro]

In the DlgProc, my app creates HotKeys:

   Select Case CbMsg

   Case %wm_initdialog
      '-----------------------------------------------------------------------------------------------
      'set up Hot Keys:
      iRet = Timer
      ReDim nAtom(%HK_Suspend To %HK_Suspend + iNumCmds -1)        
      nAtom(%HK_Suspend) = GlobalAddAtom ("My Hotkeys" + Str$(iRet + %HK_Suspend))  ' iRet makes unique identifier
      RegisterHotKey CbHndl, nAtom(%HK_Suspend), %CTRL, Asc("S")   'CTRL-S    'Suspend
      '
      nAtom(%HK_Resume)  = GlobalAddAtom ("My Hotkeys" + Str$(iRet + %HK_Resume))  
      RegisterHotKey CbHndl, nAtom(%HK_Resume), %CTRL, Asc("R")   'CTRL-R    'Resume

Should I do anything to destroy the HotKeys before the app terminates?

Or (like arrays, etc.) do they get cleaned up automatically by PB or Windows, or is this a potential problem?

[Michael Mattias]

See doc for GlobalAddAtom:

Global atoms are not deleted automatically when the application terminates. For every call to the GlobalAddAtom function, there must be a corresponding call to the GlobalDeleteAtom function.

See doc for RegisterHotKey. That includes a link to the UnRegisterHotKey function. I'll bet you can guess what that one does.

MCM

[John Montenigro]

Thanks for that!!!

OK, so would this be the proper placement? It's in the same DlgProc callback...

        Case %wm_destroy
            For iCount = 1 To iNumCmds
                UnregisterHotKey CbHndl, nAtom(iCount)
                GlobalDeleteAtom nAtom(iCount)
            Next iCount

[Michael Mattias]

OK, so would this be the proper placement?

The proper placement is the same for all of these things: When you are done with them, you free, release, close or destroy them.

If when you receive the WM_DESTROY notification for some window you are done with the hotkeys, then WM_DESTROY sounds like the right place to clean up.

MCM