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);

}