usRow (USHORT)
Row index of the value set item to select. Rows have a value from 1 to the value of the 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.
usColumn (USHORT)
Column index of the value set item to select. Columns have a value from 1 to the value of the 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.
ulReserved (ULONG)
rc (BOOL)