hi
i am using win32 GUI 1.06 with perl 5.10
in the following code i have a RichEdit control, i want to read a big file and to store it in @a array in which every element store one line.
then i want to find every occurences of 'be' pattern and to color it in Red color. my code are working fine, but if the 'be' occurrences are numerous and the file also is big, the process of coloring take too much time.
can someone please look how i could optimise the code?
Thanks 
use Win32::GUI;
use warnings;
use strict;

my $Win = new Win32::GUI::Window(
      -left   => 3,
      -top    => 5,
      -width  => 640,
      -height => 480,
      -name   => "Win",
       );

$Win->Show();
my $font = Win32::GUI::Font->new(
           -name => "Courier New",
           -size => 12,
);
$Win->AddButton(
       -text    => "Run",
       -name    => "Button1",
       -left    => 23,
       -top     => 10,
       -width   => 56,
       -height  => 36,
       -foreground    => 0,
      );
my $RichText = $Win->AddRichEdit(
       -text    => "",
       -name    => "RichText_Output",  # OutPut Rich Text
       -left    => 41,
       -top     => 91,
       -width   => 580,
       -height  => 313,
       -multiline    => 1,
       -vscroll    => 1,
      );
$RichText->SetLimitText(4194304);
Win32::GUI::Dialog();

sub Win_Terminate {
   return -1;
}
sub Button1_Click {
 my $file = "bigfile.txt";
 my $onelineOfText; my @ptrns; my $outString;
 open(MYFILE, $file) || die;
 my @a = <MYFILE>;
 chomp @a;
 my $PATTERN = 'be';
 for (@a) {
    $onelineOfText = $_;
    @ptrns = $onelineOfText =~ m/$PATTERN/g;
       if($ptrns[0])
            {
          $outString = $outString . "$onelineOfText\r\n";
         }
          }
 # print the lines containing patterns to RichText:
  $RichText->SetSel(-1,-1); # Move insertion point to the end 
  $RichText->ReplaceSel($outString); #Insert at the insertion point

 # now the coloring process of just the matches:
  my $OutStrng = $RichText->Text(); #get the contents of RichText
  my @pstn; my $flag = 1;
#get the positions of the beginning and end of every match:
#and store them in a continious array @pstn
while ($flag) {
    if($OutStrng =~ /$PATTERN/g){
    push @pstn, $-[0];
    push @pstn, $+[0];
    }
else {last}
}
my $x = 0; my $lng = $#pstn / 2;
for(0..$lng){
  $RichText -> SetSel($pstn[$x],$pstn[$x+1]);
  $RichText -> SetCharFormat( -color => "#FF0000");
  $x = $x + 2;
};

}

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In reply to coloring text in RichEdit takes long time by orange

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