>i want to use a dll in fox, example CRAXDRT o crystal or one that i made myself in vb or c#. i go to the menu of fox, tools, option, control and make an add. but i still dont know how to use, cause i dont see them.
>
>can somebody can send me a code example and some guide?
>
>regards,
>
>Ing. Carlos Gomez Collado

Assuming it's a COM DLL, you'd instantiate (get a reference to it) using CreateObject() as in:

oWSH = CreateObject("WScript.Shell")
oCrystal=CreateObject("Crystal.CRPE.Application")

See: http://fox.wikis.com/wc.dll?Wiki~CreateObject~VFP

Note: Don't forget you can post in Spanish, if you want, in the UT's Spanish language section.