ef353a76_ssions_Blogspot__February_2010__Description
[Name] Customer PO Number Check (this is a very nice tool, it prevents some orders from being duplicated) [Versions] 7.5, 8.0, 9.0, 10.0 [Price] 500 [Description] 
This tool checks the Customer PO Number for duplicates as data is entered into the field on both the SOP Entry window and the SOP Customer Detail Entry window.
Dynamics Confessions Blogspot: February 2010
Description