>i need sample form or app that uses sqlserver as backend.
>i need help to sqlserver as backend instead of vfp database.
Great, just do it :-)
Nobody can do this for you just because nobody knows what database you are using, what you need etc.
You should look at all functions that starts with SQL in HELP, check CursorAdapter Class, check Remote Views.
That should give you a starting point.
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.