>>What activeX controls are you using? Have you tried registering it manually via Start/Run/regsvr32 filepathandname ?
>>
>>>Hi friends,
>>>
>>>I am using the class buttons.vcx in my application and one of the users keeps getting the error message '0x80040154 - Class not registered'. Anyone has any ideas? Please help!!!
>>>
>>>Thanks a lot.
>
>Ken,
>
>I included that msmapi32.ocx in my project. But the users still got the error.

When you created your distribution, did you place the ocx files in the root of the distribution directory? There is a problem when putting them in subdirectories:

PRB: Setup from Setup Wizard May Install OCX in Wrong Folder

HOWTO: Register an ActiveX Control (.ocx) Manually

HTH