Hello Kashif,

 Thank you for your post. I have been looking into it and have created a small sample for you. In the sample I create an instance of the ToolWindow, the popup window that shows up  when the FieldChooserButton is pressed, and set a Closed event for this window. I set this event in the FieldChooserOpening event. Please find the attached sample and fill free to contact us if you have any further questions.

Hi Gergana Dimitrova,

i have two questions regarding field chooser

i) how can i remove "Field Chooser " text upon the field chooser popup.

ii) is there any generalized work around for hiding some fields in column chooser except explicitly setting  AllowFieldHiding property  of every attribute.

i am populating my xamdatagrid from a viewmodel observation collection source

Looking forward for your reply

For your second requirement I can suggest the following thread: http://es.infragistics.com/community/forums/t/62028.aspx . In this thread there is a sample that demonstrates how to set a filter to the FieldChooser. In the filter you can set the fields you would like not to be shown in the FieldChooser. Please feel free to contact us if I have misunderstood your requirements or you have any further questions.