I don't have a direct answer, but might get you in the right direction. I just tried packaging and deploying an app for the first time, with MSFlexGrid in it. I got errors installing on both '98 and 2000 for the same .dll's/.tlb. They are: MFC42.dll, msvcrt.dll, mshtml.tlb, and ATL.dll. After a quick search on the Web, ATL sounds like the only one possibly associated with a Grid. If any of these files sound familiar, let me know. Good Luck.