Fabian, there are various ways. There are 3rd party components like SA-FileUp from SoftArtisans. However, I would recommend using what's freely available that's already integrated with Foxpro like Foxisapi or using ASP with VFP. I'm using ASp with VFP - the code that manipulates the data is pure VFP. VFP uses the ASP BinaryRead method from the ASP Request Object. Here's an example of a standard HTML page to do this:
http://www.activevfp.com/AVFPdemo15/AVFPdemo15.asp?action=upload1
Take a look at the HTML source - you could probably just use Foxisapi with this page as well.
>Hello:
>How can i put a file into a web server from VFP 6.0 ?
>Thanks in advance