If OpenWindow(0,0,0,500,250,"Window",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  ButtonGadget(1,10,10,100,20,"Test-Button",0)
  
  DisableGadget(1,1)
  
  If IsWindowEnabled_(GadgetID(1))=1
    MessageRequester("","ButtonGadget ist aktiviert.",0)
  Else
    MessageRequester("","ButtonGadget ist deaktiviert.",0)
  EndIf
Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf