VC雕虫小技集(五)[4]

    if(wm_mousemove == pmsg->message)

              if(pmsg->hwnd == getdlgitem(idc_button1)->getsafehwnd())

              {                    

                     uint nflag  = pmsg->wparam;        // 状态,如ctrl是不按下

                     int xpos = loword(pmsg->lparam);  // horizontal position of cursor

                     int ypos = hiword(pmsg->lparam);  // vertical position of cursor

              }

       return cdialog::pretranslatemessage(pmsg);

}