Hello,

This event is generated once for each row being displayed or printed and provides an opportunity to perform actions on the row before it is rendered, such as populating an unbound cell or changing a cell's color based on its value. The InitializeRowEventArgs.ReInitialize argument can be used to determine if the row is being initialized for the first time, such as when the UltraDropDown is initially loading data, or whether it is being reinitialized, such as when the RowsCollection.Refresh(RefreshRow) method is called. Note that when you are scrolling, editing a cells this will force to refresh your row and will rise the event.

You can find more details here:
http://help.infragistics.com/Help/NetAdvantage/WinForms/2009.2/CLR2.0/html%5CInfragistics2.Win.UltraWinGrid.v9.2~Infragistics.Win.UltraWinGrid.UltraDropDown~InitializeRow_EV.html

Let me know if that make the things clear.

Sincerely,
Dimi
Developer Support Engineer
Infragistics, Inc.