If it's an ActiveX written in VC++, look for the existance of the following dlls in the windows\system directory:

MFC42.dll
MSVCRT.dll
OLEPRO32.dll

Vlad

>I try to register on ocx by issuing "regsrv32 wnostray.ocx" and an error occured: dll failed to register; What goes wrong?
>
>Thanks.