How to create the menuitem inside the child form!

Question

Hi all!

I had already created a windows forms(what i call it,parent form) and inside the parent form i also creating another windows forms(what i call it son).Both of them i add the menuitem inside the form(let say the menuitem is call File)..after i add it the menuitem.It just appear in the parent form instead of each of the form contain a File menuitem..

Does anybody know how to solve this?thanks for help!