visual studio 2012 - C++ game. Error code when compiling. Error LNK2019 -

this question has answer here:

• what undefined reference/unresolved external symbol error , how fix it? 27 answers

okay.. may stupid question. followed tutorial on how make game engine. have been fighting way through several errors, , think i'm getting last errors. here errors:

error 1 error lnk2019: unresolved external symbol _imp_messageboxa@16 referenced in function __catch$_wwinmain@16$0

error 2 error lnk2019: unresolved external symbol "public: __thiscall engine::engine(void)" (??0engine@@qae@xz) referenced in function _wwinmain@16

error 3 error lnk2019: unresolved external symbol "public: void __thiscall engine::go(void)" (?go@engine@@qaexxz) referenced in function _wwinmain@16

error 4 error lnk1120: 3 unresolved externals

code:

#include <windows.h> #include "engine.h"  int winapi wwinmain(hinstance hinstance, hinstance hprevinstance, pwstr pcmdline, int ncmdshow) {     engine* engine = new engine();      try     {         engine->go();     }     catch(char* e)     {         messageboxa(null, e, "exception occured", mb_ok | mb_iconerror);     } } 

so kinda guessed wwinmain thing, have made.but problem is, unclear me.

thanks in advance.

error lnk2019: unresolved external symbol __imp__messageboxa@16 referenced in function __catch$_wwinmain@16$0 

this error indicates need link project against user32.lib.

error lnk2019: unresolved external symbol "public: __thiscall engine::engine(void)" (??0engine@@qae@xz) referenced in function _wwinmain@16 error lnk2019: unresolved external symbol "public: void __thiscall engine::go(void)" (?go@engine@@qaexxz) referenced in function _wwinmain@16 

these errors indicate need compile , link engine.cpp project.