setup related error in c# visual stdio
I create the setup with the serial key & for validation of the key i have written function for validation.
i have all .dll & msi.lib
but i got the error as:
error : unresolved external symbol "unsigned int __stdcall MsiSetPropertyW(unsigned long,wchar_t const *,wchar_t const *)" (?MsiSetPropertyW@@YGIKPB_W0@Z) referenced in function "unsigned int __stdcall VerifyPID(unsigned long)" (?VerifyPID@@YGIK@Z) testdll.obj testdll</pre>
so how can i solve the problem?