I have it found:
I write the *init code* into a ...:
#######
&init_background();
sub init_background {
$bgWindow = $Window->AddLabel(
-name => "bgWindow",
-left => 0,
-top => 0,
-width => $screensize_width,
-height => $screensize_height,
-background => "#".$BackgroundRed.$BackgroundGreen.$BackgroundBlue,
);
}
#########
and now i say anywhere
######
$BackgroundRed = "59";
$BackgroundGreen = "12";
$BackgroundBlue = "00";
&init_background();
######
and it's work fine until now ;-)
cu
Thorsten Sommer