http://blog.csdn.net/funnyskyf/article/details/5938597

1>uafxcw.lib(afxmem.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) 已经在 LIBCMT.lib(new.obj) 中定义
1>uafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete(void *)" (??3@YAXPAX@Z) 已经在 LIBCMT.lib(delete.obj) 中定义
1>uafxcw.lib(afxmem.obj) : error LNK2005: "void * __cdecl operator new[](unsigned int)" (??_U@YAPAXI@Z) 已经在 libcpmt.lib(newaop.obj) 中定义
1>uafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete[](void *)" (??_V@YAXPAX@Z) 已经在 LIBCMT.lib(delete2.obj) 中定义

在链接命令中加入

/FORCE:MULTIPLE