1 LRESULT CALLBACK KeyBoardHook(int nCode, WPARAM wParam, LPARAM lParam) 2 { 3         if ((lParam&WS_POPUP) == 0) 4         { 5             CString str; 6             unsigned char ch; 7             if(GetKeyState(VK_CAPITAL))//大小写 8             { 9                 ch=(char)wParam;10                 str.Format("%c",ch);11 12             }13             else14             {15                 ch=(char)(wParam+32);16                 str.Format("%c",ch);17 18             }19 20             CtestMFCDlg *dlg = (CtestMFCDlg*)AfxGetApp()->GetMainWnd();21 22             str.Format("%c",ch);23             dlg->ListBox.AddString(str);24         }25     return CallNextHookEx(hk_Myhook,nCode,wParam,lParam);26 }

1 hk_Myhook = SetWindowsHookEx(WH_KEYBOARD,KeyBoardHook,0,GetCurrentThreadId());