Hooks problem

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  • kid joe

    #1

    Hooks problem

    Hi,

    I'm trying hooks for the first time and having a bit
    of a nightmare.

    I basically want to trap when other windows are resized,
    moved etc. When i set a WH_CBT hook it runs ok, but never
    seems to execute.

    When i set WH_CALLWNDPROC my machine goes mad and
    i have to reboot, im using VC++6 on win2k bbut had similar experience on
    win95.

    The code im using is below. It looks OK to me, but obviously it isnt!

    Any help would be appreciated.

    Cheers

    Joe



    BOOL InitInstance(HI NSTANCE hInstance, int nCmdShow)
    {
    HWND hWnd;

    hInst = hInstance; // Store instance handle in our global variable

    hWnd = CreateWindow(sz WindowClass, szTitle, WS_POPUP|WS_SYS MENU,
    0, -200, ww, hh, NULL, NULL, hInstance, NULL);

    if (!hWnd)
    {
    return FALSE;
    }
    ShowWindow(hWnd , nCmdShow);
    UpdateWindow(hW nd);

    hhk = SetWindowsHookE x(WH_CBT,CallWn dProc,hInstance ,0);
    // hhk = SetWindowsHookE x(WH_CALLWNDPRO C,CallWndProc,h Instance,0);
    theWnd = hWnd;

    return TRUE;

    }

    LRESULT CALLBACK CallWndProc(
    int nCode, // hook code
    WPARAM wParam, // depends on hook code
    LPARAM lParam // depends on hook code
    )
    {
    if(nCode>=0)
    {
    grabit=2;
    }

    return CallNextHookEx( hhk, nCode, wParam, lParam );

    }


    --
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    | |
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    | | .; .;|;. ;.
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    ........... . .:::::. . .______
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    .' `. .' \
    | ____,.- . | `.....' | _______ |
    | ,-' \ /|\'' \.-- |
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    | /| ` `\ / \ |
    | ,/ _ '/ '\ |
    ,-' ,-. |o '
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    ________/ .'____|________ _______________ _||__`. `__________
    ( \ ) / )
    '-. '-. ( .-` .-`
    '-. .-'--.__. .-.__.--`-. .-`
    '-..' \--' : ~`:=,`- `..-`
    \ .. \\ |`-'|`-, /
    \\\\\\\) | |`-'/.'/
    \)\)\\ `-' `-'
    `



  • Ben Pfaff

    #2
    Re: Hooks problem

    kid joe <spamtrap@spamt rap.invalidwrit es:
    I basically want to trap when other windows are resized,
    moved etc. When i set a WH_CBT hook it runs ok, but never
    seems to execute.
    >
    When i set WH_CALLWNDPROC my machine goes mad and
    i have to reboot, im using VC++6 on win2k bbut had similar experience on
    win95.
    This is Windows-specific, so you will probably get better
    responses if you ask about it in a Windows programming newsgroup.
    --
    "C has its problems, but a language designed from scratch would have some too,
    and we know C's problems."
    --Bjarne Stroustrup

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