使用动态链接库： 1、选择菜单“文件”——“新建”——“工程”——“MFC AppWizard[exe] ”建立一个单窗口程序（命名为“usedll”）2、为CMyView添加OnLButtonDown处理，添加以下代码：void CUsedllView::OnLButtonDown(UINT nFlags, CPoint point) { CClientDC dc(this);  typedef void(*Ellipse)(CClientDC *pDC,int,int,int,int); typedef void(*Rectangle)(CClientDC *pDC,int,int,int,int); Ellipse pEllipse; Rectangle pRectangle; HINSTANCE hInstance=LoadLibrary("D:\\c++\\mydll\\Debug\\mydll.dll"); PROC fn1=GetProcAddress(hInstance,"DrawEllipse"); PROC fn2=GetProcAddress(hInstance,"DrawRectangle"); pEllipse=(Ellipse)fn1; pRectangle=(Rectangle)fn2; (*pEllipse)(&dc,10,10,100,100); (*pRectangle)(&dc,100,100,150,150);  CView::OnLButtonDown(nFlags, point);}3、编译运行。

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