How To Populate Datagridview with a Stored Procedure in VirtualMode

See more:

C#

DataGridView

stored-procedure

i have a datagridview named dataGridView1, and a class named StoredProc which i keep my mssql connections and procedures.

i populate dataGridView1 :

StoredProc sp = new StoredProc();
dataGridView1.DataSource=sp.CallData(productID);

CallData is a function that returns DataTable.
but, as expected, i have lots of data to bind, and wait them all to show in dataGridView1.
i want to learn the Virtual Mode. i read some articles about Virtual Mode but couldn't succeed it in my code. don't know what to write in CellValueNeeded event or etc.

thanks for the answers from now. and thanks to CodeProject, gives me the chance of solving my problems.
Nice Day.