Deactivate/Activate Keyboard and mouse under Win32

[Sniper]

It's a Snippet (part of module i'm writing) to
deactivate/activate Keyboard and Mouse in many script to
have a UserProof Script ;-)

CTRL+ALT+DEL reactivate both :-(

use strict;
use Win32::API;

# Constants _BlockInput parameter
sub LOCK        {1};
sub UNLOCK        {0};


######################################################################
+##
# Name   : _BlockInput                                                
+ #
#                                                                     
+ #
# input  : LOCK   (1) = Lock Keyboard and Mouse                       
+ #
#          UNLOCK (0) = Unlock Keyboard and Mouse                     
+ #
#                                                                     
+ #
#       !!! WARNING !!! a simple CTRL+ALT+DEL unblock all             
+ #
######################################################################
+##
sub _BlockInput {
    my $value = shift;
    my $Library        = "user32";
    my $Function       = "BlockInput";
    my $ref_ParamsList = ['I'];
    my $ReturnValue    = 'I';

    my $BlockInput = new Win32::API($Library, $Function, $ref_ParamsLi
+st, $ReturnValue) or die $^E;
    $BlockInput->Call($value);
}


sub LockInput {
    _BlockInput( LOCK );
}

sub UnlockInput {
    _BlockInput( UNLOCK );
}


# Sample to use
print "START\n";

LockInput;

print "Try to move mouse and type keys ;-)\n";
sleep 5;

UnlockInput;

print "You are free now!\n";
print "END\n";

sleep 1;
exit;