Non so se ti sia utile, ma tieni conto di questi metodi per le Flistbox e Fcombobox.

Method
Description


addItem( )
Appends an item to the list of items in the box

addItemAt( )
Adds an item at the specified position in the list

getEnabled( )
Boolean indicating whether the element is enabled or dimmed ("grayed-out")

getItemAt( )
Returns the list item at the specified position

getLength( )
Returns the number of items in the list

getRowCount( )
Returns the number of rows displayed in a scrolling list

getScrollPosition( )
Returns the line number of the top row displayed

getSelectedIndex( )
Returns the index of the current list selection

getSelectedIndices( )
Returns an array of indexes of, potentially, multiple selections

getSelectedItem( )
Returns the selected list item as an object

getSelectedItems( )
Returns an array of selected items as objects

getSelectMultiple( )
Boolean indicating whether multiple items can be selected in a list box

getValue( )
Returns the value of the selected item

registerSkinElement( )
Registers a skin element for changing the component appearance

removeAll( )
Removes all items from the list

removeItemAt( )
Removes a specified item in the list

replaceItemAt( )
Replaces the item at the specified position in the list

setAutoHideScrollBar( )
Boolean specifying whether to hide the scroll bar when it isn't needed

setChangeHandler( )
Specifies the callback function to call when the list's state changes

setDataProvider( )
Specifies an array of elements or a DataProvider object to populate the list

setEditable( )
Boolean specifying whether the combo box's contents are editable

setEnabled( )
Enables or disables (i.e., deactivates) the list box

setItemSymbol( )
Specifies the Library symbol ID of a graphics symbol for displaying list content

setRowCount( )
Specifies the maximum number of rows displayed in a list

setScrollPosition( )
Causes the list box to scroll to the specified item

setSelectedIndex( )
Selects an item in the list by its row index (zero-relative)

setSelectedIndices( )
Specifies an array of items (by index) to be selected

setSelectMultiple( )
Boolean specifying whether multiple items can be selected in a list box

setSize( )
Sets the width of the combo box or list box, in pixels (can also set height of a list box)

setStyleProperty( )
Sets a particular style property for the combo box or list box (for a list of supported properties, see the FStyleFormat object)

setValue( )
Sets the current value for a combo box

setWidth( )
Sets the list box width, in pixels

sortItemsBy( )
Sorts the items in the list by either their labels or the underlying data