[perl-win32-gui-users] $ListBox->Select(0); ... $ListBox->Select(5);

[tivolinewbie]

I have created a Listbox with -multisel => 1

Afterwards the listbox is created, I offer the user a
checkbox to allow him to select everything in the list
box.  So suppose the user click on the checkbox, I
would to be able to get the listbox to highlight all
the items in it.  I have tried using
$ListBox->Select(0)... $ListBox->Select(5) and so on. 
But the application doesn't seem to highlight the items
in the ListBox.  Not even a single item is highlighted.
 Any idea why this is so??