Regd Menu Merging in MDI container in C#

I''m using SyncFusion in our application for menu merging and xp interfaces. In my application I have an activex control embedded in an MDI child form. And whenever user comes to that MDI child tab, I need to merge the activex control''s menus along with parent form''s menus. I don''t have the parent form''s code. So I''m not able to get the mainframebarmanager.mainmenubar. It is always returning null when i try to access. Is that the right way? How should I access it, or what is the way to embed client''s menus with parent menus? Pls give me a solution to embed client control''s menus in parent''s menu.

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