getpixel 取色

 HWND hwnd = ::FindWindow(NULL,"《天龙八部OL》");
     CRect rect;
     CString strTmp;
     if (hwnd != NULL)
     {
         ::SetWindowPos(hwnd,HWND_TOP,,,,,SWP_NOSIZE|SWP_NOMOVE|SWP_SHOWWINDOW);
         ::GetWindowRect(hwnd,&rect);

         ::SetForegroundWindow(hwnd);

         HDC hdc=::GetDC(NULL);
         if (hdc==NULL)
         {
             MessageBox("getwindowDC");
         }
         ::InvalidateRect(hwnd,NULL,);

         COLORREF color1=GetPixel(hdc,rect.left+,rect.top+);
         COLORREF color2=GetPixel(hdc,rect.left+,rect.top+);
         COLORREF color3=GetPixel(hdc,rect.left+,rect.top+);
         COLORREF color4=GetPixel(hdc,rect.left+,rect.top+);
         COLORREF color5=GetPixel(hdc,rect.left+,rect.top+);
         COLORREF color6=GetPixel(hdc,rect.left+,rect.top+);
         strTmp.Format("%X,%X,%X,%X,%x,%x",(DWORD)color1,(DWORD)color2,(DWORD)color3,(DWORD)color4,(DWORD)color5,(DWORD)color6);

         m_edtString=m_edtString+"\r\n"+strTmp;
         UpdateData(FALSE);
         SetCursorPos(rect.left+,rect.top+);
         mouse_event(MOUSEEVENTF_LEFTDOWN,,,,);
         //mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);                //不抬起不会进入。

         ::ReleaseDC(hwnd,hdc);