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 the blank Untitled document disappear. The user may not want a blank document to remain open if she opens an existing file.