class MyLess
{
public:
bool operator()(const CString str1,const CString str2)const
{
return TRUE;
}
};
map<CString,CString,MyLess> MapSendValue;
http://www.360doc.com/content/13/0928/20/593831_317716994.shtml
原文：http://www.cnblogs.com/dengpeng1004/p/4546726.html