>>>I need to know how to insert a new column (or modify the structure) in runtime in a remote table from vfp6.0..
>>>
>>>thanks in advance
>>
>>If by "remote table" you mean one in a backend database like SQL Server or Oracle, you would need to use SQL passthrough to do this. Use SQLCONNECT() to create a connection to the database, then SQLEXEC() to pass a command to the back end to add the column.
>>
>>The exact syntax of the command you pass using SQLEXEC() depends on the backend you're using.
>>
>>You also need permission in the remote database to modify the table(s).
>
>I already have a connection to the database created in ms Acces.
>
>i use this commant to try to modify
>
>=SQLEXEC(NHANDLE,"ALTER TABLE GROUPS ADD COLUMN fax c(20)")
>
>obviously, the connection its working rigth but this command never modify the table or add a column

I don't know Access, but from a quick browse of MSDN online library you might try:

=SQLEXEC(NHANDLE,"ALTER TABLE GROUPS ADD COLUMN fax Text;")