LRESULT __stdcall LowLevelKeyboardProc(int nCode, 
WPARAM wParam, LPARAM lParam) {     BOOL fEatKeystroke = FALSE;     if (nCode == HC_ACTION) { 
switch (wParam) { 
case WM_KEYDOWN: case WM_SYSKEYDOWN: 
case WM_KEYUP: case WM_SYSKEYUP: 
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam; 
fEatKeystroke = 
((p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0)) || 
((p->vkCode == VK_ESCAPE) && ((p->flags & LLKHF_ALTDOWN) != 0)) || 
((p->vkCode == VK_ESCAPE) && ((GetKeyState(VK_CONTROL) & 0x8000) != 0)|| 
(p->vkCode == VK_LWIN) || (p->vkCode == VK_RWIN));     break; 
} 
} 
return(fEatKeystroke ? 1 : CallNextHookEx(NULL, nCode, wParam, lParam)); 
} 
然後主程序中： 
HHOOK hhkLowLevelKybd; 
//裝載禁止功能鍵的鉤子 
hhkLowLevelKybd = SetWindowsHookEx(WH_KEYBOARD_LL, 
(HOOKPROC)LowLevelKeyboardProc, HInstance, 0); 
//卸載禁止功能鍵的鉤子 
UnhookWindowsHookEx(hhkLowLevelKybd);     3。屏蔽開始菜單的熱鍵（左Ctrl鍵右邊那個} 
//禁止任務欄 
::ShowWindow(::FindWindow("Shell_TrayWnd",NULL),SW_HIDE); 
::EnableWindow(::FindWindow("Shell_TrayWnd",NULL),FALSE); 
4。讓自己的窗體出現在最上層 
void TFormMain::FullScreen() 
{ 
//獲取屏幕的分辨率 
TRect m_FullScreenRect; 
m_FullScreenRect.left = 0; 
m_FullScreenRect.top = 0; 
m_FullScreenRect.right = Screen->Width; 
m_FullScreenRect.bottom = Screen->Height; 
//進入全屏顯示狀態 
WINDOWPLACEMENT wndpl; 
wndpl.length =sizeof(WINDOWPLACEMENT); 
wndpl.flags =0; 
wndpl.showCmd =SW_SHOWNORMAL; 
wndpl.rcNormalPosition=m_FullScreenRect; 
SetWindowPlacement(Handle,&wndpl); 
}