Sorry Cetin, bad writing.

I send this on SQL Query Analyzer ( and on VFP SPT ).

USE pubs

exec sp_executesql N'USE master; SELECT @P1   ; SELECT DB_NAME()'
, N'@P1 INT',  1

SELECT DB_NAME()

result:

1

master

pubs

It is correct, the USE database within sp_executesql is valid only
within sp_executesql.

From the first moment, it would seem that the same commando, constructed from VFP in order to replace the ?parameter,
renders effective commando USE ( executed within sp_executesql ) in the connection , but I do not find one explanation.

Fabio