how do I close the dialog and at the same time run a subroutine in the background

[lointaineimage <lointaineimage gmail com>]

I want to destroy the dialog and call a subroutine when I click the
"yes" button,here is part of my code ,but it doesn't work well,the
dialog is closed until the subroutine is finished.waiting for your
help,thanks!

here is part of my code:
#=========================================
my $dialog =Gtk2::MessageDialog->new
  ($window,'destroy-with-parent','something to confirm','yes-no',");
  my $response = $dialog->run;
  if($response eq "yes"){
      $dialog->destroy;
      &mysubroutine;
  }