[Zope] ZClasses and methods

Hi! Hope this questions hasn't already been answered on the list. Lately I've been working on a ZClass thingie, but got stuck last night. I've made several methods dtml- and external ones to the class, and want more, mainly a dtml method displaying a form. Now thats no problem, but how shall I address other methods, contained in the class, in the 'action' part of the form? Help is much appreciated! Sture Lygren