Hi,
There is no support provided to explicitly apply page breaks in a direct manner while printing as this can be achieved through customized print document by deriving the GridPrintDocument class and overriding the OnBeginPrint method.
You can also follow the below msdn link which exemplifies the overriding of PrintDocument class.
http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/bfe43688-e2f2-4de4-8369-98faec06875aRegards,
Jisha