int GetSelItems( int nMaxItems, LPINT rgIndex ) const;
nMaxItems
Specifies the maximum number of selected items whose item numbers are to be placed in the buffer.
rgIndex
Specifies a long pointer to a buffer large enough for the number of integers specified by nMaxItems.
Fills a buffer with an array of integers that specifies the item numbers of selected items in a multiple-selection list box.
The actual number of items placed in the buffer. If the list box is a single-selection list box, the return value is LB_ERR.
LB_GETSELITEMS