use Win32::GUI;

$screen = new Win32::GUI::DC("DISPLAY");

while(1) {
    ($x,$y) = Win32::GUI::GetCursorPos();
    $color = $screen->GetPixel($x,$y);
    next if $color eq $last;

    $last = $color;
    printf ("%06X\n", $color);
    sleep 1;
}
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On my PC, I save 50% CPU (1 % vs 52%) if I move the "sleep 1" as the first statement in the "while(1){" loop, with very minimal(un-noticable for practical purposes) loss in responsiveness.

     "Income tax returns are the most imaginative fiction being written today." -- Herman Wouk

Yum. I'll need to start absorbing all the Win32 knowledge I can for my job (can't give you a Web URL since they don't really have one. Huzzah, I get to set up Apache / IIS!).

Psst ... don't tell them that they're paying me to have fun, okay? :)

Sometimes it is needed this program for color interpretation.

Always i get an error in interpreting color. I'm change the label color ex: "red" color code,

but program not display "red" color ex. display "blue" color !!!

This is best solution.There is my advenced code;

# Author : KuNdUz
# 10.02.2011 - 13:35
use strict;
use warnings;
use Win32::GUI;
use Number::RGB;

my $Win = new Win32::GUI::Window(
      -left   => 341,
      -top    => 218,
      -width  => 300,
      -height => 131,
      -name   => "Win",
      -text   => "->GetPixel Advanced"
      );

$Win->Show();

my $font = new Win32::GUI::Font(
-bold => 1,
-size => 18,
);
$Win->AddLabel(
       -name    => "Label_1",
       -left    => 0,
       -top     => 0,
       -width   => 300,
       -font => $font,
       -height  => 130,
);
my $screen = new Win32::GUI::DC("DISPLAY");
my $timdre1 = $Win->AddTimer('tim',100);
sub tim_Timer {
my ($x,$y) = Win32::GUI::GetCursorPos();
my $color = $screen->GetPixel($x,$y);
my $kaka = sprintf ("%06X\n", $color);
# print "html : $kaka\n";
my $green  = Number::RGB->new(hex => '#'.$kaka);
# print "rgb : $green\n";
my $last = $color;
if($color eq $last){}
$green =~ /(.+),(.+),(.+)/;
$Win->Label_1->Change(-text => "Html Hex : $kaka\nRGB Hex : $green", -
+background => [$1,$2,$3]);
}    
Win32::GUI::Dialog();
sub Win_Terminate {
   return -1;
}
1;
1;
# Author : KuNdUz
[download]