Following code show how to add scrollbar to list box when the list box becomes too long.
#include <GetNbox.h> void STR_MAX_SHOWN_ITEM_COUNT_ATTRIB_ex() { GETN_BOX( treeTest ); //each list box has 5 items GETN_LISTBOX(LType, "GETN_LISTBOX", 1, "t-Test|Correlation|NLSF|Polynomial Fit|Statistics") GETN_MULTISEL_STR_LISTBOX(StateList, _L("GETN_MULTISEL_STR_LISTBOX"), "", "Apple|Orange|Banana|Berries|Grapes") GETN_MULTISEL_LISTBOX(list, "GETN_MULTISEL_LISTBOX", 0, "Apple|Orange|Banana|Berries|Grapes") //only show 3 items treeTest.LType.SetAttribute(STR_MAX_SHOWN_ITEM_COUNT_ATTRIB, 3); treeTest.StateList.SetAttribute(STR_MAX_SHOWN_ITEM_COUNT_ATTRIB, 3); treeTest.list.SetAttribute(STR_MAX_SHOWN_ITEM_COUNT_ATTRIB, 3); if( GetNBox( treeTest )) out_tree( treeTest ); }