You will need the SqlClient namespace:
You will also need SqlConnection and SqlCommand objects.
Your connection string would be something like this:
"Data Source=YourDatabaseServer;Initial Catalog=YourDatabase;User ID=YourDatabaseUser;Password=YourPassword"
-Declare and instantiate your SqlConnection and SqlCommand objects
-Assign the appropriate connection string to the SqlConnection
-Assign the connection and the appropriate SQL command text to the SqlCommand
-Open the SqlConnection
-Execute the SqlCommand
-Close the SqlConnection