HelloMouse.pl

#!/usr/bin/env perl

use SDL;
use SDL::Events;
use SDL::Event;
use SDL::Video; 

SDL::init(SDL_INIT_VIDEO);

my $display = SDL::Video::set_video_mode(640,480,32, SDL_SWSURFACE );
my $event   = SDL::Event->new(); 

while(1)
{   
	SDL::Events::pump_events();  

	if(SDL::Events::poll_event($event) && $event->type == SDL_ACTIVEEVENT)
	{
		print "Hello Mouse!!!\n" if ($event->active_gain  && ($event->active_state == SDL_APPMOUSEFOCUS) );
		print "Bye Mouse!!!\n"   if (!$event->active_gain && ($event->active_state == SDL_APPMOUSEFOCUS) );
	}   
	
	exit if($event->type == SDL_QUIT);
}