This message specifies the type of information that will be contained by a value set item. This item is indicated by the values of the usRow and usColumn fields. Each value set item can contain a different type of information. The value set interprets the information set for the item based on the attribute of the item. Value set items that are not set (blank items) are drawn using the background color of the value set.

param1
     USHORT  usRow     /*  Row index. */
     USHORT  usColumn  /*  Column index. */

param2
     ULONG   ulItemId  /*  Item information. */