Is there a way to put an application icon in the "tray" ?

[Linuxguy123]

On Thu, 2008-11-27 at 11:20 -0500, Dave Feustel wrote:
> On Thu, Nov 27, 2008 at 08:13:19AM -0500, Linuxguy123 wrote:
> > Is there a way to put an application icon (evolution, konqueror,
> > dolphin, etc) in the "tray" (ie the bar at the bottom of the desktop, or
> > should I say edge) in KDE 4.1.3 ? 
> > 
> > I know about putting application icons on the desktop itself.  I've done
> > that. 
> 
> Drag the icon from your desktop to the tray.

That doesn't work.  That used to work in KDE 3.5.