Display description

Hi
I would like to know is it possible to display the content of a cell to be displayed when i select another cell.
Let me explain
I have part number in col. A and the description of the part is in col Z.
for eg if I click A5 . I should have a pop up window with the description in Z5 (like an input message in Data Validation- or like a comment display). This will make easier to know the description of my Part no than to go and check in col. Z.
Is there any VB script for that.
Hope my question is clear.
Thanks for your help.
Regds
Toms