扩展MFC DLL在vc6/vc8中的编译和调用,主要想法是允许dll导出函数原型中含有CString类型,将一些涉及到MFC类的有用代码封装在dll中,方便在其他vc程序中复用。-MFC DLL extension in the compilation and vc6/vc8 call, the main idea is to allow export dll function prototype contains a CString type, issues relating to the MFC class of useful code encapsulated in the dll in vc in other programs to facilitate reuse.