Thanks, as always, Sergey, ;-)
just wanted to answer myself that I need to compile a 32-bit version of the VB.Net app, but I need to check out how to do this.

Guess there are both, 32- and 64-bit versions of the .Net-framework installed on Vista 64 and it runs on WOW then.
Thx
G.

>The VFP OLE DB provider has only 32-bit version. It cannot be used from 64-bit applications.
>
>>I just tried the OLE DB sample from
>>http://support.microsoft.com/default.aspx?scid=kb;en-us;956277&sd=rss&spid=7992
>>and it works fine on XP SP3, VFP9 / OLE DB 5815 and VS2008SP1.
>>
>>With the same components on Vista 64 I get "OLE DB not installed", though it is.
>>
>>Is this a 64bit issue, is there an OLE DB 64 (needed) or is there another component missing by chance?
>>
>>Thx
>>G.