When a user clicks on a row I want to put the row in edit mode and allow editing of all the cells and display two buttons (save/cancel) in a column.   If the grid (row) is not in edit mode I dont want to display the buttons but I want the width of the column where they reside to remain constant.

How do I do that?

Edit:  Here are threads on the same topic but do not answer this specific question:

http://ko.infragistics.com/community/forums/p/67385/341708.aspx#341708
http://ko.infragistics.com/community/forums/p/36132/210661.aspx#210661
http://ko.infragistics.com/community/forums/p/60578/319175.aspx#319175 (Buttons need to be in their own column, always visable when user is editing)

Thanks,

Sam