How to make search box on your web site

Google provide a custom search box which make you able to
search content on your website with the help of Google custom search box
just paste this code on your website where you want to place it...........

<form action="http://www.google.com/cse" id="cse-search-box" target="_self">
  <div>    
    <input type="hidden" name="ie" value="ISO-8859-1" />
    <input type="text" name="q" size="25" /><br />
    <input type="submit" name="sa" value="Search" class="formoutput"/>
  </div>
</form>
<script type="text/javascript" src="http://www.google.com/cse/brand?form=cse-search-box&amp;lang=en"></script>