Accessing Master Page User Control (ascx) event and value in content page.

Accessing Master Page User Control (ascx) event and value in content page.

Sometimes a situation comes wherein you want to do some action on any event fired by master page user control in to a content page.
We can do this by the help of "Delegates".
The situation is I have a user control with a dropdown in header.ascx file, which I have integrated in my masterpage.master.
Now I want to access the event of that dropdownbox (SelectedIndexChanged ) in my content page default2.aspx and the value of the drop down box.