File Handling in Drupal - file_delete()

<?php
 
  //You should use single quotes here because the path has backslashes!
  $path = 'c:\windows\temp/test.txt';
 
  //Try to delete the file
  $success = file_delete($path);
 
  //If the file was successfully deleted, update the database
  if ($success){

    db_query('DELETE FROM {files} WHERE filepath = "%s"', $path);
  } else {

    echo "There is some problem in Deleting the file!";

  }
  ?>