DestroyWindow (basic-newbie)
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Thread: DestroyWindow (basic-newbie)

  1. #1
    Join Date
    Apr 2014
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    DestroyWindow (basic-newbie)

    Hi friends,

    why can't i close the calculator (calc.exe) with DestroyWindow?....is something wrong with the code bellow?

    ..........................................
    #include <windows.h>
    #include <stdio.h>

    int main()
    {


    HANDLE h=(void*)0x0007066C; //I get the hex from spy++

    printf("Address: %p\n", h);

    //HWND hh = FindWindow(NULL, "Calculator"); //with FindWindow (also doesn't work)

    HWND hh=(HWND)h;

    DestroyWindow (hh);

    return 0;

    }
    ..........................................

    thanks.

  2. #2
    2kaud's Avatar
    2kaud is online now Super Moderator Power Poster
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    Re: DestroyWindow (basic-newbie)

    See http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx

    Basically, a thread cannot use DestroyWindow to destroy a window created by a different thread.

    Have a look at PostMessage() http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx
    with WM_CLOSE message.
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

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  3. #3
    VictorN's Avatar
    VictorN is online now Super Moderator Power Poster
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    Re: DestroyWindow (basic-newbie)

    Quote Originally Posted by _rjf View Post
    Hi friends,

    why can't i close the calculator (calc.exe) with DestroyWindow?....is something wrong with the code bellow?
    ..........................................
    As 2kaud already wrote DestroyWindow is not a correct way to cleanly terminate an application.
    See what MSDN suggests:
    HOWTO: Terminate an Application "Cleanly" in Win32
    Victor Nijegorodov

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