# Is it possible to extend fl.controls.ComboBox

**URL:** https://forum.kirupa.com/t/is-it-possible-to-extend-fl-controls-combobox/236754
**Category:** flash
**Created:** [August 23, 2007, 12:32pm UTC](https://forum.kirupa.com/t/is-it-possible-to-extend-fl-controls-combobox/236754 "2007-08-23T12:32:54Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![glidealong](https://avatars.discourse-cdn.com/v4/letter/g/da6949/32.png) [@glidealong](https://forum.kirupa.com/u/glidealong)
#### Post date: [August 23, 2007, 12:32pm UTC](https://forum.kirupa.com/t/is-it-possible-to-extend-fl-controls-combobox/236754/1 "2007-08-23T12:32:54Z")

</div>

Hello All,

I was trying to create a custom ComboBox by extending the fl.controls.ComboBox.

```auto

package CustromControls
{
    import fl.controls.ComboBox;
    public class CustomCombo extends fl.ComboBox
    {
        public function CustomCombo():void
        {

        }
    }
}

```

and i get the error\*\*  
1017: The definition of base class ComboBox was not found.

\*\*Any clue??

Thanks