use warnings;
use strict;
no strict 'subs';


my @list_items;

use constant LVM_SETITEMCOUNT => 4143;

use Win32::GUI::Constants qw(/^(MB_|ILC_|IDYES|SB_|DT_|WS_|LVS_)/);
use Win32::GUI();


my $wnd = Win32::GUI::Window->new(
	-size => [500, 500]
);

my $lines = $wnd->AddTextfield(
	-prompt => ['Lines:', 80],
	-pos => [160, $wnd->ScaleHeight - 30],
	-height => 24,
	-width => 100,
	-popstyle => WS_BORDER,
	-tabstop => 1,
	-text => 5000
);


my $refresh_btn = $wnd->AddButton(
	-pos => [10, $wnd->ScaleHeight - 30],
	-size => [100, 24],
	-text => 'Refresh',
	-onClick => \&update_list
);

my $list = $wnd->AddListView(
	-name => 'list',
	-pos => [10, 10],
	-size => [$wnd->ScaleWidth - 20, $wnd->ScaleHeight - 50],
	-gridlines => 1,
	-popstyle => WS_BORDER,
	-pushstyle => LVS_OWNERDATA 
);
$list->Hook(LVM_SETITEMCOUNT, sub {
	################
	# What I need to write there?
	################
});

$list->InsertColumn(
	-width => 24
);

$list->InsertColumn(
	-width => 200
);



$wnd->Center();
$wnd->Show();
Win32::GUI::Dialog;



sub update_list() {
	my $line = 0;
	my $max_lines = $lines->Text();
	
	$list->Clear();
	
	@list_items = ();
	for (1 .. $max_lines) {
		push(@list_items, {-text => [$_, rand(9999999)]});
	}
	
	$list->SetItemCountEx(scalar @list_items, 0);
}