Esp.obj : error LNK2001: unresolved external symbol "float __cdecl VectorAngle(float const * const,float const * const)" (?VectorAngle@@YAMQBM0@Z) Radar.obj : error LNK2001: unresolved external symbol "float __cdecl AngleNormalize180(float)" (?AngleNormalize180@@YAMM@Z) Release/NewCoD1Project.dll : fatal error LNK1120: 2 unresolved externals