SetWindowsHookEx(WH_KEYBOARD,KeyBoardProc,NULL,GetCurrentThreadId());   第一个为消息类型，听说有13种 第二个为返回消息 第三个为HINSTANCE 第四个为（用DLL全局钩子的话该项可为0）线程ID   LRESULT CALLBACK KeyBoardProc(int nCode, WPARAM wParam, LPARAM lParam) 消息处理   LRESULT CALLBACK KeyBoardProc(int nCode, WPARAM wParam, LPARAM lParam){ CString str; int keydown ; for(keydown=0x41 ;keydown<=0x5A;keydown++) {  if((DWORD)keydown == wParam)  {   if(FindWindow(NULL,"获取按键值") != NULL)   {    CHOOK_KEYBOARDDlg * ck ;   // ck =(CHOOK_KEYBOARDDlg *)FindWindow(NULL,"获取按键值") ;   // ck =(CHOOK_KEYBOARDDlg *)GetActiveWindow();   // ck =(CHOOK_KEYBOARDDlg   *)GetParent(GetActiveWindow());   // ck->m_hWnd =FindWindowEx(NULL,NULL,NULL,_T("获取按键值"));    ck =(CHOOK_KEYBOARDDlg *)ck->FromHandle( ::FindWindowEx(NULL,NULL,NULL,_T("获取按键值")) );    ck->m_Epassword.Format("%c",(TCHAR)wParam);    ck->UpdateData(false);   }  } } return CallNextHookEx(oldkeyhook, nCode, wParam, lParam);}

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