EnableExplicit

#UIS_CLEAR = 2
#UISF_HIDEFOCUS = 1
#UISF_HIDEACCEL = 2

If OpenWindow(0,0,0,500,250,"Window",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  ButtonGadget(1,10,10,100,20,"Button 1",0)  
  ButtonGadget(2,120,10,100,20,"Button 2",0)
  CheckBoxGadget(3,10,40,100,20,"CheckBox",0)
  
  SetActiveGadget(1)
  
  SendMessage_(WindowID(0), #WM_UPDATEUISTATE, ((#UISF_HIDEFOCUS|#UISF_HIDEACCEL)<<16) | #UIS_CLEAR, 0)
  
Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf