pulldownmenu with check/radiobuttons

["Ignacio Nodal" <inodal teleline es>]

How is the easiest way to create a  pulldown menu which item is a list of
check or radiobuttons??

I want to write an enumeration, which can be a button with different pixmaps
for each enumeration item (already done), or this pulldown menu i'm asking
for..

Thanks in advance
 Ignacio Nodal