@SW_hide for all windows

[RedShade]

Hi guys! I need your help again!
During the execution of the script new windows are constantly appearing.
I decided to use this script:

Do
$aWinList = WinList()
For $i=1 To $aWinList[0][0] Step 1
WinSetState ( $aWinList[$i][0], "", @SW_HIDE )
Next
Until ProcessExists("Installer.exe")="0"

But this is script is really bad, because this this script is too slow (Windows have time to appear on the desktop).

Is there any way to assign to all future windows option @SW_Hide?
 

[JohnOne]

GUISetState when creating the window.

[jguinch]

What your script supposed to do?