@SW_SHOWDEFAULT vs $WS_EX_TOPMOST

[pixelsearch]

Hi all,
When creating a GUI, we often want it to stay on top, no matter any other window we clic on.
To achieve this, I found 2 different ways. When you run the following script, just clic on any other window and see how the GUI will stay on top :

#include <GuiConstantsEx.au3>
#include <WindowsConstants.au3>

For $i = 1 to 2
   If $i = 1 Then
      $hGui = GUICreate("1 - @SW_SHOWDEFAULT", 300, 300, -1, -1, _
         $WS_MAXIMIZEBOX + $WS_MINIMIZEBOX + $WS_SIZEBOX, @SW_SHOWDEFAULT)
   Else
      $hGui = GUICreate("2 - $WS_EX_TOPMOST", 300, 300, -1, -1, _
         BitOr($WS_MAXIMIZEBOX, $WS_MINIMIZEBOX, $WS_SIZEBOX), $WS_EX_TOPMOST)
   EndIf
   GUISetState(@SW_SHOW)
   While GUIGetMsg() <> $GUI_EVENT_CLOSE
   WEnd
   GUIDelete($hGui)
Next

It appears that @SW_SHOWDEFAULT or $WS_EX_TOPMOST do the same job, both keeping the window on top.

The question is : anyone knows if one of them should always be used instead of the other, for a particular reason ?

 

Edited August 10, 2018 by pixelsearch