thaks it did help, just don't know how to create a batch file on the fly and execute it I'm new to C# and never used it on VB.

Just need to send DOS commands like "sqlcmd -S ..." to register a database in the SQL and use it in the path it puts it, I'm in the begining of my application and see the best way to use the database.

Anyone knows how to handle (read/write) the registry to search for a path, and how to send DOS commands for example to send SQL commands to attach and dettach a database from the SQL server?

Anyone knows how to handle the code in chapter 26 from the book "Microsoft Visual C# Step by Step"? This example runs well except for adding a row to the listview control that is biding with the Northwind database, I tryed everything but it seems the problem is the data binding and the listview control that doesn't recognize the format of the table problably because the table is joined with another table and the listview control refers to only one table. I will post the code that gives a the runtime error later.