need some help :D

anyone who will help me, will get credits from me in the next release

now, this is my problem:

Code:

1>tab menu prove kot.obj : error LNK2019: unresolved external symbol "public: void __cdecl cMain::DrawString(int,int,unsigned long,struct ID3DXFont *,char const *,...)" (?DrawString@cmain@@QAAXHHKPAUID3DXFont@@PBDZZ) referenced in function "public: void __thiscall cMenu::AddCheck(char *,int,int,int,int,struct IDirect3DDevice9 *,int)" (?AddCheck@cMenu@@QAEXPADHHHHPAUIDirect3DDevice9@@H@Z)
1>tab menu prove kot.obj : error LNK2001: unresolved external symbol "class cMain Main" (?Main@@3VcMain@@A)
1>tab menu prove kot.obj : error LNK2019: unresolved external symbol "public: void __thiscall cMenu::StyleRender(struct IDirect3DDevice9 *)" (?StyleRender@cMenu@@QAEXPAUIDirect3DDevice9@@@Z) referenced in function "public: void __thiscall cMenu::Render(struct IDirect3DDevice9 *)" (?Render@cMenu@@QAEXPAUIDirect3DDevice9@@@Z)

anyone has faced this problem before and wanna share the solution with me

please, if you do not wanna help me, do not write.