EnableExplicit

If OpenWindow(0,0,0,500,250,"Window",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  SetWindowLongPtr_(WindowID(0),#GWL_STYLE,GetWindowLongPtr_(WindowID(0),#GWL_STYLE)&~#WS_DLGFRAME)
  
Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf