John, I don't the reason, but some instalers don't install properly MSMAPI32.OCX (the control that ships with VFP to access MAPI DLLs). Try to add this key to the registry in your client's computer:

HKEY_CLASSES_ROOT\Licenses\DB4C0D00-400B-101B-A3C9-08002B2F49FB
with the data value: mgkgtgnnmnmninigthkgogggvmkhinjggnvm

It should work.
Javier.

>I have an application that includes an emailer to the selected customers.
>
>Although my customer does have Outlook (with which we've successfully automated a zillion times), I would prefer to use MAPI, so that I don't have to depend on a specific mail client - part of the deal is that we shall retain the property rights to the software and we may well then sell it as a packaged solution.
>
>ox = CREATEOBJECT("MSMAPI.MAPISession")
>
>The above statement gives an error (don't know the exact words unfortunately) along the lines of "there is no licence for this control".
>
>On my development machine (Fox8, SP1, Outlook, WinXP) it works fine, but on my client's primary machine (Fox runtimes, Outlook express, Win98) the above error is triggered. I have placed MSMAPI32.DLL in their windows\system dirtecory (and also into their App and windows directory as a check) but to no avail.
>
>Any ideas? Thanks in advance,
>
>JC