绘制图形界限及设置坐标原点 C 语言
// 移动坐标原点到客户中心区
SetMapMode (hdc, MM_ISOTROPIC);
SetWindowExtEx (hdc, 1024, 768, NULL);
SetViewportExtEx (hdc, cxClient, -cyClient, NULL);
SetViewportOrgEx (hdc, cxClient / 2, cyClient /2, NULL);
// 移动坐标原点到客户中心区
SetMapMode (hdc, MM_ISOTROPIC);
SetWindowExtEx (hdc, 1024, 768, NULL);
SetViewportExtEx (hdc, cxClient, -cyClient, NULL);
SetViewportOrgEx (hdc, cxClient / 2, cyClient /2, NULL);