from console application to windows form

[lakmohd]

hello,

i finished my project in console application and i am working on converting it into windows forms project, but i am having problems with including header files. when i rebuild the solution i get the following error:
{
error LNK2028: unresolved token (0A000024) "public: static bool __clrcall EEComp2::lt(class course &,class course &)" (?lt@EEComp2@@$$FSM_NAAVcourse@@0@Z) referenced in function "private: class BinNode<class course> * __clrcall BST<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class course,class KEComp2,class EEComp2>::inserthelp(class BinNode<class course> *,class course &)" (?inserthelp@?$BST@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Vcourse@@VKEComp2@@VEEComp2@@@@$$FAAMPAV?$BinNode@Vcourse@@@@PAV2@AAVcourse@@@Z)
}