Problem in Subclassing

[moinkhan]

i m having the problem in subclassing.. I want to capture WM_CLOSE message and want to do something other than just closing.. then i want to close the form as well. ... everything goes right..other than when i try to close the form.. i don't want it's default proc to handle this message so i skip calling it.. but when i use SendMessage to close my form.. it's closing my whole application... and if i use DestroyWindow then it's not returning resources to the system... so form is out but resources are still there...
Do u have any idea?

[Shawn N]

Why not "unsubclass" right before sending out the WM_CLOSE message?

[moinkhan]

This way wouldn't its default proc run?

[Shawn N]

I'm not sure what your last reply meant.

Anyways, 2nd option: Try sending additional data in your wParam or lParam. Test for it in your subclassing procedure and skip the message processing if necessary.

Example:

SendMessage frmMain.hwnd, WM_CLOSE, 12345, 0

Case WM_CLOSE
     If wParam = 12345 Then 'No need to process
          'call default proc
          Exit Sub
     End If

[moinkhan]

But it's also not working..

[wpearsall]

is this what u mean....

[make sure if u are closing the app, u unsubclass first, AND DONT USE END! it will screw the app.]

[moinkhan]

I am doing exactly whatever u said....

Let me tell u the actual situation....
I have a control which shows a dialog box when i close the form containing that control... (it does so only in exe) i want to override this behavior my hooking the default window procedure...and process WM_CLOSE message myself..
the problem is that.. whenever i used any method to close the form that messes up the things..
If I use sendmessage to send WM_CLOSE Event. that closes the whole application with an illegal operation message, when i use DestroyWindow it doesn't unload the form..and another thing that form doesn't get loaded again..once i've used DestroyWindow to close the form...
I think now the things are clear

[wpearsall]

how bout shelling a seperate app,
instead of loading a form....

depending on what you need to do on the "exit form", it should work...

private sub form_unload(cancel as integer)
on error resume next
    call shell(app.path & "\ExitApp.exe")
    if err then err.clear
end sub

[Abilio]

Post the code. I must see it before.