extern "C" __declspec(dlleXPort) void __stdcall SetHook(HWND,bool);

LRESULT CALLBACK HookProc(int nCode,WPARAM wParam,LPARAM lParam)

//----------------------------------------------------------------------------------------------------

static HINSTANCE hInstance; // 应用实例句柄

static HWND hWndMain; // MainForm句柄

static HHOOK hKeyHook; // HOOK句柄

static const myMessage=2000; // 自定义消息号

static const SecondPar=1; // 自定义消息第2参数

//----------------------------------------------------------------------------------------------------

int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void* lpReserved)

{ hInstance=hinst; return 1; }

//----------------------------------------------------------------------------------------------------

void __stdcall SetHook(HWND hMainWin,bool nCode)

{

if(nCode) // 安放HOOK

{

hWndMain=hMainWin;

hKeyHook=SetWindowsHookEx(WH_JOURNALRECORD,(HOOKPROC)HookProc,hInstance,0);

}

else // 卸下HOOK

UnhookWindowsHookEx(hKeyHook);

}

//----------------------------------------------------------------------------------------------------

LRESULT CALLBACK HookProc(int nCode,WPARAM wParam,LPARAM lParam)

{

EVENTMSG *keyMSG=(EVENTMSG *)lParam;

if((nCode==HC_ACTION)&&(keyMSG->message==WM_KEYUP))

PostMessage(hWndMain,myMessage,(char)(keyMSG->paramL),SecondPar);

// 向调用窗体发消息myMessage和虚拟键码(char)(keyMSG->paramL)

return((int)CallNextHookEx(hKeyHook,nCode,wParam,lParam));

}

//----------------------------------------------------------------------------------------------------

应用代码如下：（调DLL）