>Hello Everyone,
>
>Any one can explain with example that how can i restore sqlexpress database .bak file in vb.net!!!!..

first you need to have the statement that SQL Server understands.

http://lmgtfy.com/?q=restore+sql+server+database+from+.bak+file that should help;

Once you have the script you pass that in the form of :

mycom.ExecuteNonQuery()

where mycom is loaded with the connection string and script.

HTH