>I am working on textbox on the form. And with pageframe, three page total. Page 1 with table1(parent table), page2 with table2(Child table) and page3 with table3(child table).
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>I have set the RI for the relationship, update, delete to be cascade. How should I go about it in the record pointing?

It sounds like your problem may have more to do with the pageframe than the RI. (As an aside, I usually don't allow cascading deletes, but if you want to use them, they should work properly if you use the RI builder.) For the individual pages in the pageframe, they do not automatically refresh when you refresh the pageframe. Only the Activepage is refreshed. What I do to refresh the pages so that it properly reflects the record pointer's location is put the following code in the Activate method of each page:

This.Refresh()

Hope this helps.