Hello,

Displaying milliseconds in the xamDateEditor is not availables. Here is a link with all the available masks for the XamEditors - http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html%5CxamEditors_Masks.html

Instead of XamDateEditor you can use XamTextEditor and for Text get extract the miliseconds from the DateTime object. Does this work in your scenario?

Alex.