>Cetin,
>
>Your suggestion to look at the VFP solution application's file association registry example answered my question.
>
>Thanks for your help!
>Malcolm
>
>
>>In solution app there is a sample code for file associations. It basically shows how to open and read a reg key. From extension if you read class, under HKCR you can find that class and under it Shell key has 'open', 'print' etc supported items.

Malcolm,
When you have time also check for a message similar to 'How can I get CLSID' created yesterday (Nov 15th,2001). There you'll find a summarized registry querying functions (3 of them open, close and query value).
Also read filer documentation. It's been a while I didn't check it but somewhere I read you could incorporate it in your apps (might be wrong). It's a high probability it already has many of the functions you want.
Cetin