opening mdi child window

Question

hi

Im doing a project in that one main mdi form will be there.. and in that i need to open all the other form as child form and im doing it by this code..

frmchild frmc=new frmchild();
frmc.mdiparent=this;//this represent the mdiform
frmc.show();

and this code works but in some places i need open a new window from a child window and i need to access the menus in the mdimain and im not able to do that..

can any1 help me..
thank u..