You can use the following built-in functions with list box objects.
| Function | Description | 
| bottom [of] | Returns the line number of the last line in the list box. | 
| top [of] | Returns the line number of the first line in the list box (which is always 1). | 
| textual line from | Returns the text that appears on the specified line of the list box. (See textual Object Inquiry Built-in Function in the Reference Guide.) | 
| selected line | Returns the currently selected line in for each selected line loop. | 
| selected line from | Returns the line number of the line that the user has selected from the list box. If used on a multiple-selection list box, it returns only the first line selected. | 
| window yposition of | Returns the line number of the first line displayed in the list box. |