How to Clear ListBox and Put items back to another ListBox

[Codartizan]

Hi Guys, I have a problem hope someone can help me. Many thanks.

The Picture is the GUI of my auto-test. I want to clear all the items in the right Listbox via press Clear button. 

Part of Code

=======================================================================================

 

Func btnAdd()

     $rightmoveitem = GUICtrlRead($ListAvaiCom)
     If StringStripWS($rightmoveitem, 8) Then
            ConsoleWrite($rightmoveitem & @CRLF)
            GUICtrlSetData($ListChoCom, $rightmoveitem)
            $iSel = _GUICtrlListBox_GetCurSel($ListAvaiCom)
            _GUICtrlListBox_DeleteString($ListAvaiCom, $iSel)
      EndIf

EndFunc

Func btnRemove()

     $leftmoveitem = GUICtrlRead($ListChoCom)
     If StringStripWS($leftmoveitem, 8) Then
            ConsoleWrite($leftmoveitem & @CRLF)
            GUICtrlSetData($ListAvaiCom, $leftmoveitem)
            $iSel = _GUICtrlListBox_GetCurSel($ListChoCom)
           _GUICtrlListBox_DeleteString($ListChoCom, $iSel)
     EndIf

EndFunc

Func btnClear()

    ;_GUICtrlListBox_ResetContent($ListChoCom)

EndFunc

====================================================================================

with this code I only can clear all the items of right listbox, but cannot put those items back to the left box.

below is the screenshot. Thank you very much.

Edited June 26, 2016 by Codartizan

[AutoBert]

Please use the <> Code-Tag for posting scriptcode. Also a running (reproducer-) script is better than a picture. With scriptcode copy and paste is possible, without the helper must script a GUI. And as i think, there's no need that help willing people have more work as needed.