fatal error LNK1120: 1 unresolved externals - visual-c++

Question

how can i solve this ,when i compile my source im got this error
Neuz.exe : fatal error LNK1120: 1 unresolved
EditString.obj : error LNK2019: unresolved external symbol "public: void __thiscall CEditString::ParsingString(char const *,unsigned long,unsigned long,unsigned short,class ATL::CStringT<char,class StrTraitMFC<char,class ATL::ChTraitsCRT<char> > > &,class CDWordArray &,class CByteArray &,class CWordArray &,unsigned long)" (?ParsingString#CEditString##QAEXPBDKKGAAV?$CStringT#DV?$StrTraitMFC#DV?$ChTraitsCRT#D#ATL#####ATL##AAVCDWordArray##AAVCByteArray##AAVCWordArray##K#Z) referenced in function "public: void __thiscall CEditString::AddParsingString(char const *,unsigned long,unsigned long,unsigned short,unsigned long)" (?AddParsingString#CEditString##QAEXPBDKKGK#Z)

Answer 1

If the class CEditString is implemented in one of your source files then add the source file to your project.
If the class CEditString is implemented in a library (.LIB) then add the library to your project.
If the class CEditString is implemented in a DLL then add the import library to your project.
In the latter two cases verify that you have included the correct and unchanged header files matching the exported symbols. You can use dumpbin to see the exported symbols of the LIB and the DLL.