I don't know for sure if that's the reason, but I remember Aldo warning about using the style option, because you inadvertently remove, or leave out, styles that may be important. Try using -addstyle to add styles and -remstyle to remove styles. That will leave all the standard style flags untouched. With a little luck, this also solves your problem.
have fun,
-----Original Message-----
From: Howard, Steven (US - Tulsa) [mailto:sthoward@deloitte.com]
Sent: Sunday, December 09, 2001 15:13
To: Perl-Win32-Gui-Users (E-mail)
Subject: [perl-win32-gui-users] Event handler stops working when style is added

I'm having a little problem with listboxes and the Click event handler when I add a -style option to the listbox. Hopefully someone here can spot what is going wrong and help me out.

My list box is defined like this:

        my $lb  = $disp->AddListbox (
           -name                        =>                   'Paygroups',
           -pos                 =>                       [20, 40],
           -height                      =>                       $disp->ScaleHeight - 50,
           -width                       =>                       100,
         -style                 =>                       WS_VSCROLL | WS_VISIBLE | WS_CHILD,

# A second listbox is relevant to this example because items are added and removed in the event handler:

        my $locations = $disp->AddListbox (
           -name                        =>                        'Locationbox',
           -pos                 =>                       [140,40],
           -height                      =>                       $disp->ScaleHeight - 50,
           -width                       =>                       $disp->ScaleWidth - 160,
        #   -style                      =>                       WS_VSCROLL | WS_VISIBLE | WS_CHILD,

#The first listbox is populated like this:


        my $sth = $dbh->prepare($select) || die "Can't prepare\n$select\n$DBI::errstr\n";
        $sth->execute() || die "Can't execute\n$DBI::errstr\n";
        while ($row = $sth->fetchrow_arrayref) {
                  push (@{$payloc{$$row[0]}}, $$row[1]);
        foreach (sort keys %payloc) {

# The Click event handler is this:

                sub Paygroups_Click {
                        my $item = $lb->SelectedItem();
                        my $key;
                        if ($item != -1){
                           $key = $lb->GetString($item);
                           foreach (sort(@{$payloc{$key}})) {
                        print "Selected: $key\n";

The problem is that if I comment out the -style option in the listbox $lb, everything works in the event handler subroutine exactly as I wanted it to, the only problem being that there are quite a large number of paygroups and no vertical scroll bar. That will be a large annoyance to others. When I un-remark the -style option on the $lb, the listbox is populated like I need, but the Click event handler no longer function. No print statements placed in the sub work, the second listbox is no longer populated with the locations listed in the @{$payloc{$item}} array - nothing.

Can anyone tell me what is going wrong?

Thanks in advance,

Steve Howard
Sr. DBA DTO Tulsa.
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