So i have this slider $Slider1 = GUICtrlCreateSlider(3, -44, 21, 50, BitOR($GUI_SS_DEFAULT_SLIDER,$TBS_VERT,$TBS_NOTICKS)) $Label1 = GUICtrlCreateLabel("", -1, 1, 36, 17) $Slider1_value = GUICtrlRead($Slider1) While 1 $Data = 100 - GUICtrlRead($Slider1) If $Data <> $Slider1_value Then If $Data < 101 Then GUICtrlSetData($Label1, $Data) $Slider1_value = $Data EndIf EndIf $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE Exit EndSwitch WEnd I g