Concepts of Computing, Section II

Visual Basic Example Programs I

• Counter
• Flip
• Traffic
• TrafficAnimation

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Counter

Event counter

Controls and properties:

• Form
  • Name
  • Caption
• Command button
  • Name
  • Caption
• Label
  • Name
  • Caption
  • Alignment
  • Backround color
  • Font

Language features:

• Event subroutines
• Controls and properties
• Arithmetic expressions
• Assignment

Source files:

• Counter.vbp
• Counter.vbw
• frmCounter.frm

Flip

Coin-flipping simulation.

Language features:

• Built-in functions: Int and Rnd
• Control structure: If ... Then ... Else ...

Source files:

• Flip.vbp
• Flip.vbw
• frmFlip.frm

Traffic

Traffic light simulation

Controls and properties:

• Shape
  • Shape
  • Fill Color
  • Fill Style

Language features:

• Variables and declarations: Dim ...
• Type checking: Option Explicit
• Control structure: Select Case ...

Source code:

• Traffic.vbp
• Traffic.vbw
• frmTraffic.frm

TrafficAnimation

Animated traffic light simulation

Controls and properties:

• Timer
  • Interval

Source code:

• TrafficAnimation.vbp
• TrafficAnimation.vbw
• frmTrafficAnimation.frm

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