Problem Defn :

I am having a invoice entry form in which I am having four
memo fields i.e. four edit box one for each memo i.e ( item description , Qty , Rate , Amount ) . If I edit any thing in first field i.e item description
I need to have the position in other edit box should have similar changes
means if I press ENTER key at 4th line in Item Desc field then same key should be pressed in other edit regions also so that I could have a line to line correspondence . For some functional requirements
I do not have all four attribute in single memo field .

Is there any solution ?
I tried for _ed functions but I couldn't get
Anybody guide me