Visual Basic 6 Programming: Business Applications with a Design Perspective

Table of Contents

Chapter 10 Special Topics in Data Entry

• 10.1 Principles of GUI Design
  • Simplicity and Clarity
  • Flexibility
  • Consistency
  • Immediate Feedback
  • Forgiveness
  • Pleasant Appearance
• 10.2 Designing a User Friendly Keyboard
  • Handling the Enter Key
  • Auto Tabbing
  • Arrow Keys Up and Down
  • Providing Access Keys
  • Using the SSTab Control
• 10.3 Additional Considerations
  • Detecting Unsaved Data
  • Handling Unsaved Data When the Program is Quitting
• 10.4 Checking for Data Entry errors
  • When the User Presses a Key
  • When the User Has Done with the Field
  • When the User Is Ready to Proceed
• 10.5 Handling Errors
  • A User's Nightmare
  • The On Error Statement
  • The Line Label Statement
  • The Err Object
  • How the Error Handler Works
• 10.6 Providing Visual Clues
  • Listing Prime Numbers: an Illustrative Example
  • The Prime Number Computing Algorithm
  • The Mouse Pointer
  • Messages for Progress Status
  • The Progress Bar
• Summary
• Visual Basic Explorers
• Exercises
• Projects