wellcome on board.

so, what happens if you change line:
$ret = SetWallPaper($RepertoireSource + $TableauNomFichiers[$indexaleatoire])
to:
$ret = SetWallPaper($RepertoireSource + $TableauNomFichiers[$indexaleatoire],0)
or to:
$ret = SetWallPaper($RepertoireSource + $TableauNomFichiers[$indexaleatoire],1)
???

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