ADO.NET ExecuteReader in OleDbCommand Object
ExecuteReader() in OleDbCommand Object send the SQL statements to Connection Object and populate a OleDbDataReader Object based on the SQL statement. When the ExecuteReader method in OleDbCommand Object execute , it instantiate a OleDb.OleDbDataReader Object.
The OleDbDataReader Object is a stream-based , forward-only, read-only retrieval of query results from the Data Source, which do not update the data. The OleDbDataReader cannot be created directly from code, they created only by calling the ExecuteReader method of a Command Object.
connetionString = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source = Your mdb filename;"
sql = "Your SQL Statement Here like Select * from product"
You have to replace the string with your realtime variables.