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DLL to detect close button event (C++ source)

Author: Marcelo

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; Example code (need the DLL above)
AppTitle "test123"

; First parameter is the scancode to fake, the second is the window name
InstallCloseHandler(57, "test123")

While (Not KeyHit(1))
    ; This if will be TRUE when the user tries to close the window, usually don't use a common key
    If KeyHit(57)  
        DebugLog("yeah")
    EndIf
Wend

UnInstallCloseHandler()

Another example using the win32 api messagebox when hitting the escape key (1) or closing the window..

AppTitle "My Game"

; First parameter is the scancode to fake, the second is the window name
InstallCloseHandler(148, "My Game") ; Map to a least used key

MB_ICONASTERISK = $20
MB_OKCANCEL = $1

Repeat
    Cls
    ; This if will be TRUE when the user tries to close the window, usually don't use a common key
    If KeyHit(1)  Or KeyHit(148)
        result = api_MessageBox(0, "Are you sure you want to exit?", "Exit Game", MB_ICONASTERISK + MB_OKCANCEL )
        If result = 1 Then End
    EndIf
    Flip
Forever

UnInstallCloseHandler()

End