$| = 1;

use blib;
use Win32::API;
use Win32::API::Callback;

my $Callback = Win32::API::Callback->new(
	sub { 
		my($hwnd, $lparam) = @_;
		printf "EnumWindows callback got: HWND=0x%08x LPARAM=%d\n", $hwnd, $lparam;
		return 1;
	},
	"NN", "N");

$EnumWindows = new Win32::API("user32", "EnumWindows", "KN", "N");

$EnumWindows->Call($Callback, 42);