Hello Ramesh,

We do not provide the full xaml code for our themes. However, you can override them like this:

xmlns:Themes="http://infragistics.com/Themes"

...

<Style TargetType="{x:Type igDP:DataRecordCellArea}" BasedOn="{x:Static Themes:DataPresenterOnyx.DataRecordCellArea}">

This style will override the DataRecordCellArea for the Onyx Theme.

Hope this helps.