>Hello.
>I have a P12 file that I have to use digitally sign an XML document.
>How can I programmaticaly open that file with the user and password ?
>I've been reading about Crypt32 api but I need some advide about it.
>Thank you.

Chilkat controls handle pfx/p12 files. https://www.chilkatsoft.com/p/p_439.asp

If you go to Examples on the chilkat site, select Visual FoxPro, you can find your way to do all the common actions on security certificate files.

Hank