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MFC绘图设备类有CDC基类,派生出CPaintDC子类,CWindowDC子类,CClientDC子类,CMetaFileDC子类
1.CDC基类
2.CPaintDC子类
在MFC的消息映射OnPaint()之中,一定要调用
CPaintDC dc(this);
CPaintDC *dc=new CPaintDC(this);
否则OnPaint消息会一直不断重复调用刷新,其中的原理在于MFC调用WinSDK之中隐藏掉了BeginPaint()和EndPaint()两个函数
3.CWindowDC子类
4.CClientDC子类
5.CMetaFileDC子类
后续有空补上......