author: IUnListBox is the common interface to listbox-widgets. A listbox presents aauthor: list of items to the user. The user is able to select one of the itemsauthor:
Removes all values from the listBox and deletes the values if they are registred
Removes all values from the listBox
Returns the size of the listBox
size
Sets the size of the listBox
Parameters: xSize - the size in lines of the listBox