HOOK

HHOOK SetWindowsHookEx(  int idHook,        // hook type    --------------------WH_KEYBOARD  HOOKPROC lpfn,     // hook procedure            安装的回调函数  HINSTANCE hMod,    // handle to application instance        DLL句柄  DWORD dwThreadId   // thread identifier                           线程ID);


LRESULT CALLBACK KeyboardProc(                          回调函数  int code,       // hook code  WPARAM wParam,  // virtual-key code                      实际按键代码  LPARAM lParam   // keystroke-message information);


LRESULT CallNextHookEx(  HHOOK hhk,      // handle to current hook                  键盘安装钩子句柄  int nCode,      // hook code passed to hook procedure  WPARAM wParam,  // value passed to hook procedure  LPARAM lParam   // value passed to hook procedure);