DataGridView Expand And Collapse C#

Hi All,

I want to make my datagridview to expand and collapse rows, here i have found an example of exactly what i want but i have been trying for the past two days but i couldn't get anywhere with it.

http://www.codeproject.com/Articles/14388/OutlookGrid-grouping-and-arranging-items-in-Outloo

can any1 please write me the codes for one of expand and collapse rows using c# winforms

thanks and regards

MR.Mohabbat

MR.Mohabbat