Select function with set return type

<div dir="ltr">Hi all,<br /><br />I am writing some functions with retrun type as a SETOF of a datatype that I have
defined.How can I test them with a select statement.<br />Doing select my_function(); return set valued function called
incontext that cannot accept a set<br /><br />Thanks to all<br /><br />Nacef<br /></div>