usRow (USHORT)
Row index of the items to be queried. Rows have a value from 1 to usRowCount field. This value, which is the total number of rows in the value set, is specified in the VSCDATA data structure when the value set control is created.
Column index of the items to be queried. Columns have a value from 1 to usColumnCount field. This value, which is the total number of columns in the value set, is specified in the VSCDATA data structure when the value set control is created.
pointer to the BIDIATTR structure.