Chapter 6 Quick Reference

Chapter 6 Quick Reference

To	Do this
Write a conditional expression	Use one of the following comparison operators between two values: =, <>, >, <, >=, or <=.
Use an If…Then decision structure	Use the following syntax: If condition1 Then statements executed if condition1 True ElseIf condition2 Then statements executed if condition2 True Else statements executed if none are True End If
Receive input from the user in a specific format	Add a MaskedTextBox control to your form, and specify the input format by configuring the Mask property.
Use a Select Case decision structure	Use the following syntax: Select Case variable Case value1 statements executed if value1 matches Case value2 statements executed if value2 matches Case Else statements executed if none match End Select
Rename an object in a program	Select the object that you want to rename, and then modify the object's Name property by using the Properties window. If you give the object a three-character prefix that identifies its object type (btn, lbl, lst, etc.), the object is easier to spot in program code.
Make two comparisons in a conditional expression	Use a logical operator between comparisons (And, Or, Not, or Xor).
Short-circuit an If…Then statement	If…Then statements can be short-circuited when the AndAlso and OrElse operators are used and two or more conditional expressions are given. Depending on the result of the first condition, Visual Basic might not evaluate the additional conditions, and the statement is short-circuited.
Write an event handler	In the Code Editor, click an object name in the Class Name list box, and then click an event name in the Method Name list box. Add program statements to the event procedure (called an event handler) that respond to the event you are customizing.