Running back ground action
<p>I need some thing like sending SMS to inactive users. If some user is inactive for 36hrs he much get a text saying <code>you are away from this site</code> To do this how an ASP.NET page fires the query for every 3 minutes to check for the new user's inactivity in database.</p>

<p>I have a code to perform the query. I need how in ASP.NET to run query for every 3 minutes without opening browser. Do ASCX file does my work? or should I use something else.</p>
