A Multiple Document Interface(MDI) is a style of application where a number of similar or dissimilar child windows can reside within a main window. These are different from simple controls; they are more like 'main' windows in their own right and are the 'documents' of the mdi.

• Multiple Document Interface(MDI)

This example creates a simple multiple document interface(mdi) with two mdi child windows, one with a listbox and the other with an edit control occupying their respective client areas.