Visual Basic 2008 Programming: Business Applications with a Design Perspective
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9
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Chapter 10: Special Topics in Data Entry
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10.3 Additional Considerations on Friendly GUI Design

This section considers the potential loss of data onscreen when the program quits. The user may have clicked a wrong (Quit) button unintentionally after an entire screen of data has been entered but not yet saved. To guard against such a possibility, you should detect and warn the user of unsaved data, and allow the user to back out of the Quit button.
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  1. Arrow Keys Up and Down
  2. Auto Tabbing
  3. Providing Access Keys
  4. Using the Tab Control
  • 10.3 Additional Considerations on Friendly GUI Design
    1. Detecting Unsaved Data
    2. Handling Unsaved Data When Quitting
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