[Zope-dev] How to use document templates

Hi! Where can i find S_I_M_P_L_E example of using document templates with zope/python. I have this external method, wich return several variables from object class. I want to embed to results in DTML page. The method is called from Zope by HTML form with 3 input attributes. Right now i have only managed to get obj.member in return plain screen. I can't use <dtml-var> tag, because i need to send those input values to the external method. ( i must be sound like real newbie, in fact i'm :) ) How i get those results in DTML page? Is the templates the answer or this there better way to this. jarkko