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GDI 映射模式
MM_TEXT 1逻辑单位 = 1像素
MM_LOMETRIC 1逻辑单位 = 0.1mm
MM_HIMETRIC 1逻辑单位 = 0.01mm
MM_LOENGLISH 1逻辑单位 = 0.01 in = 0.254mm
MM_HIENGLISH 1逻辑单位 = 0.001 in = 0.0254mm
MM_TWIPS 1逻辑单位 = 1/1440 in = 0.0176mm
默认映射模式:MM_TEXT
MM_LOMETRIC
MM_HIMETRIC
MM_LOENGLISH
MM_HIENGLISH
MM_TWIPS
除MM_TEXT外的默认坐标轴
1 case WM_PAINT: 2 hdc = BeginPaint(hWnd, &ps); 3 // TODO: 在此添加任意绘图代码... 4 SetMapMode(hdc, MM_LOMETRIC); 5 Rectangle(hdc, 100, -100, 200, -200); 6 SetMapMode(hdc, MM_TEXT); //使用完后改回默认映射模式 7 EndPaint(hWnd, &ps); 8 break;
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原文地址:http://www.cnblogs.com/2016Study/p/5399688.html