关于SetWindowOrgEx.SetViewportOrgEx.SetViewportExtEx 和SetWindowExtEx 详解 1. SetWindowOrgEx是设置窗口的原点坐标. 例如: Ellipse(hdc,-100,-100,100,100); MoveToEx(hdc,-200,0,NULL); LineTo(hdc,200,0); MoveToEx(hdc,0,-200,NULL); LineTo(hdc,0,200); MoveToEx(hdc,0,0,NULL)…