C#

string thisItem = string.Empty;

	   //This information is derived from the Data Grid on tabControlA
            //Get the Row Number from the Grid View
            int row = this.dataGridView1.CurrentCell.RowIndex;

            //Get the Value from the Id column, check for null, create parameter
            if (this.dataGridView1["Id", row].Value.ToString() != "")
            {
                thisItem = this.dataGridView1["Id", row].Value.ToString();
            }           

            //Run SQL query to get the data
            MethodA(thisItem);

            //View the information on a different Tabbed Page
            tabControlB.BringToFront();
            tabControlB.SelectTab(1);