在Dialog程序中使用WH_KEYBOARD_LL类型HOOK

在Dialog程序中使用WH_KEYBOARD_LL类型HOOK的方法:

SetWindowsHookEx(WH_KEYBOARD_LL, (HOOKPROC)LowLevelKeyboardProc, AfxGetApp()->m_hInstance, NULL);

LRESULT CALLBACK LowLevelKeyboardProc (INT nCode, WPARAM wParam, LPARAM lParam)

{

    // By returning a non-zero value from the hook procedure, the

    // message does not get passed to the target window

    KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *) lParam;

    BOOL bControlKeyDown = 0;

    switch (nCode)

    {

        case HC_ACTION:

        {

            // Check to see if the CTRL key is pressed

            bControlKeyDown = GetAsyncKeyState (VK_CONTROL) >> ((sizeof(SHORT) * 8) - 1);

            // Disable CTRL+ESC

            if (pkbhs->vkCode == VK_ESCAPE && bControlKeyDown)

                return 1;

            // Disable ALT+TAB

            if (pkbhs->vkCode == VK_TAB && pkbhs->flags & LLKHF_ALTDOWN)

                return 1;

            // Disable ALT+ESC

            if (pkbhs->vkCode == VK_ESCAPE && pkbhs->flags & LLKHF_ALTDOWN)

                return 1;

            // Response to Up

            if ((pkbhs->vkCode == VK_UP) && (WM_KEYUP == wParam))

            {

                    HWND hwnd=::FindWindow(NULL, "WindowCaption");

                    ::PostMessage(hwnd, WM_COMMAND, ID_MENU_ITEM, 0L);

            }

        }

        default:

            break;

    }

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

}

BOOL InstallKbHook( )

 {

    if (hhookKb )

        UninstallKbHook();

    hhookKb = SetWindowsHookEx(WH_KEYBOARD_LL,

        (HOOKPROC)LowLevelKeyboardProc, AfxGetApp()->m_hInstance, NULL);

    return(hhookKb != NULL);

}

BOOL UninstallKbHook()

{

    BOOL fOk = FALSE;

    if (hhookKb ) {

        fOk = UnhookWindowsHookEx(hhookKb );

        hhookKb = NULL;

    }

    return(fOk);

}