(c) 2002 Visual Studio Magazine 
Fawcette Technical Publications

Issue: May 2002
Section: ASP.NET
Author: Dino Esposito
Filename: vs0205an

This articles code includes two ASPX pages implementing both the simple and the optimized approach to creating a DataGrid expand/collapse mechanism that mimics, over the Web, the behavior of several Windows message boxes. 

You can find Listing 1 in the listings.txt file.