I''ve been using different SDK''s and API''s for a long time, so this usually doesn''t bother me for more than a minute. This problem is driving me nuts though. I''m writing a plugin for 3dsmax4, and I followed the help file exactly to get my workspace set up in vc++6. I ended up linking with every lib that comes with the SDK, but I still can''t resolve this link error. It even appears when I try to build the samples in the SDK. tacRPGplugin.obj : error LNK2001: unresolved external symbol "public: virtual char * __thiscall ClassDesc::GetRsrcString(long)" (?GetRsrcString@ClassDesc@@UAEPADJ@Z) D:\3DSMAX4\PLUGINS\tacRPG.DLO : fatal error LNK1120: 1 unresolved externals Thanks to anyone that can help me. ^_^