>Thanks for the info,
>
>Registering msmapi32.ocx on the NT box worked. But now my application gives the following error:
>
>OLE Error Code 0x80040112:
>Appropriate liscense for this class not found.
>
>At design time, if I insert the Mapi controls on the form, instead of creating the objects from a prg, the error goes away. Why?

The control has two different types of licenses. One for runtime, one for design time. It's best to do an install that'll take care of the proper registration issue for you.