If OpenWindow(0,0,0,500,250,"Window",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  ListIconGadget(1,10,10,0,0,"Test-Überschrift",400,0)
  
  SetWindowLongPtr_(GadgetID(1),#GWL_EXSTYLE,0)
  SetWindowPos_(GadgetID(1),0,10,10,480,230,#SWP_FRAMECHANGED)
Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf