Chapter 27. MULTIPLE-DOCUMENT INTERFACE (MDI)

Many programs deal with only one file or document at a time. These applications are classified as single-document interface, or SDI, applications. An example of an SDI application is the Windows Notepad applet. However, users often need to see multiple documents at a time, or be able to present multiple views into the same document. Applications that let the user do this are called multiple-document interface, or MDI, applications.

An MDI application consists of three types of windows. The main window of the application is known as the MDI frame window. It consists of the title bar, sizing border, system menu, minimize button, and other system-defined features. An MDI application registers a window ...

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