无标题窗体的拖动程序[DllImport("user32.dll")]publicstaticexternboolReleaseCapture();[DllImport("user32.dll")]publicstaticexternboolSendMessage(IntPtrhwnd,intwMsg,intwParam,intlParam);publicconstintWM_SYSCOMMAND=0x0112;publicconstintSC_MOVE=0xF