EnableExplicit

Define EventID
Define a

If OpenWindow(0,0,0,500,400,"Window",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  TrackBarGadget(1,10,10,200,50,0,50,0)
  
  SetWindowLongPtr_(GadgetID(1), #GWL_EXSTYLE, GetWindowLongPtr_(GadgetID(1), #GWL_EXSTYLE) | #WS_EX_LAYOUTRTL)
  
  Repeat
    EventID=WaitWindowEvent()
    If EventID=#PB_Event_Gadget
      Select EventGadget()
        Case 1
          Debug GetGadgetState(1)
      EndSelect
    EndIf
    If EventID = #PB_Event_CloseWindow
      End
    EndIf
  ForEver
EndIf