Sample C#
string value = gridView1.GetFocusedRowCellValue("ColumnName").ToString();
string value = gridView1.GetDataRow(e.FocusedRowHandle)["ColumnName"].ToString();
string value = (gridView1.GetFocusedRow() as DataRowView).Row["ColumnName"].ToString();
string value = gridView1.GetFocusedDataRow()["ColumnName"].ToString();
Sample VB.NET
Dim value as String = gridView1.GetFocusedRowCellValue("ColumnName").ToString()
Dim value as String = gridView1.GetDataRow(e.FocusedRowHandle)("ColumnName").ToString()
Dim value as String = TryCast(gridView1.GetFocusedRow(), DataRowView).Row("ColumnName").ToString()
Dim value as String = gridView1.GetFocusedDataRow()("ColumnName").ToString()