I have come across the following error during compilation. Please help me to resolve the same.

--------------------Configuration: libnxlp - Win32 Debug--------------------
Linking...
  Creating library Debug/libnxlp.lib and object Debug/libnxlp.exp
main.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class StringMap & __thiscall StringMap::operator=(class StringMap &)" (__imp_??4StringMap@@QAEAAV0@AAV0@@Z)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class StringMap & __thiscall StringMap::operator=(class StringMap &)" (__imp_??4StringMap@@QAEAAV0@AAV0@@Z)
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class StringMap & __thiscall StringMap::operator=(class StringMap &)" (__imp_??4StringMap@@QAEAAV0@AAV0@@Z)
winfile.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class StringMap & __thiscall StringMap::operator=(class StringMap &)" (__imp_??4StringMap@@QAEAAV0@AAV0@@Z)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall StringMap::StringMap(void)" (__imp_??0StringMap@@QAE@XZ)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall StringMap::~StringMap(void)" (__imp_??1StringMap@@QAE@XZ)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: char * __thiscall StringMap::Get(char const *)" (__imp_?Get@StringMap@@QAEPADPBD@Z)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall StringMap::Set(char const *,char const *)" (__imp_?Set@StringMap@@QAEXPBD0@Z)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::operator char *(void)" (__imp_??BString@@QAEPADXZ)
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::operator char *(void)" (__imp_??BString@@QAEPADXZ)
parser.obj : error LNK2001: unresolved external symbol __imp__XMLGetAttrDWORD
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class String const & __thiscall String::operator=(char const *)" (__imp_??4String@@QAEABV0@PBD@Z)
parser.obj : error LNK2001: unresolved external symbol __imp__XMLGetAttr
parser.obj : error LNK2001: unresolved external symbol __imp__XMLGetAttrInt
parser.obj : error LNK2001: unresolved external symbol __imp__XMLGetAttrBoolean
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall String::IsEmpty(void)" (__imp_?IsEmpty@String@@QAEHXZ)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall String::Strip(void)" (__imp_?Strip@String@@QAEXXZ)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall String::AddString(char const *,unsigned long)" (__imp_?AddString@String@@QAEXPBDK@Z)
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall String::AddString(char const *,unsigned long)" (__imp_?AddString@String@@QAEXPBDK@Z)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::String(void)" (__imp_??0String@@QAE@XZ)
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::String(void)" (__imp_??0String@@QAE@XZ)
parser.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::~String(void)" (__imp_??1String@@QAE@XZ)
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall String::~String(void)" (__imp_??1String@@QAE@XZ)
rule.obj : error LNK2001: unresolved external symbol __imp__regcomp
rule.obj : error LNK2001: unresolved external symbol __imp__regfree
rule.obj : error LNK2001: unresolved external symbol __imp__regexec
rule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class String const & __thiscall String::operator+=(char const *)" (__imp_??YString@@QAEABV0@PBD@Z)
Debug/libnxlp.dll : fatal error LNK1120: 20 unresolved externals
Error executing link.exe.

Regards,

Antony Vasanth