Sarosh,

>So in that case how do I navigate in that Child/GrandChild grid from the context menu (via a right click) if they choose 'Next' to go to the next row in the child/grandchild grid.

You can work with the form's BindingContext object to navigate to a different position (which is ultimately what's happening behind the scenes in MM .NET) by means of its position property. For details on BindingContext check out this MSDN link:

http://msdn2.microsoft.com/en-us/library/system.windows.forms.bindingcontext.aspx

Best Regards,