Adding the 'Address' toolbar to the Windows XP Taskbar

Wnen you right click the Windows Xp Taskbar - click on toolbar - click on Address - An 'address' toolbar appears in the taskbar.

You are supposed to type URL's here so that you can create a list of them from which to choose. How is this invoked . I have tried double clicking and right clicking on the 'address' it to open it up but nothing happens.?

Ta very Muuch

Juls.