From Here…
The sample application developed in this chapter introduces the concepts of creating and managing MDI applications. This is a simple application; you may want to practice your skills by incorporating some of the following suggested enhancements:
Assign a unique Text property to each new instance of the child form. As it stands, you may have many child windows open whose captions say Untitled. A more reasonable approach may be to assign consecutively numbered captions (Untitled1, Untitled2, and so on).
Show the user a PrintDialog control before printing the document, giving her the option of setting printer options before the actual printing takes place.
When the user issues the File, Open menu command to open an existing document, have ...
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