Execute SQL commands

[x-ice]

I have the following code.

'Set SQL statements
        With daStaff
            .DeleteCommand.CommandText = "DELETE FROM Staff" 'Delete statement
            .InsertCommand.CommandText = "INSERT INTO Staff" 'Insert statement
            .UpdateCommand.CommandText = SQLUpdateStr 'Update statement
        End With

How would i execute the "Delete, Insert or Update' CommandText?

When i am in the code window i see .ExecuteNonQuery, .ExecuteReader and .ExecuteScalar when i type daStaff.UpdateCommand. in the dropdown list. Which one, if any would i use?