Beginning Visual Basic 2012

Appendix A

Exercise Solutions

Chapter 1

The code for the following exercise is found in the code file Chapter 1/Exercise1.zip.

1. Create a Windows application with a Textbox control and a Button control that will display whatever is typed in the text box when the user clicks the button.

A. To display the text from a text box on a form when the user clicks the button, you add the following bolded code to the button's Click event handler:

 

 Private Sub btnDisplay_Click(sender As Object, _
 e As EventArgs) Handles btnDisplay.Click
  'Display the contents of the text box
 MessageBox.Show(txtInput.Text, "Exercise 1")
 End Sub

Chapter 2

No exercises for Chapter 2.

Chapter 3

1. Create a Windows application with two button controls. In the Click event for the first button, declare two Integer variables and set their values to any number that you like. Perform any math operation on these variables and display the results in a message box.

In the Click event for the second button, declare two String variables and set their values to anything that you like. Perform a string concatenation on these variables and display the results in a message box.

!

A. The first part of this exercise requires you to declare two Integer variables and set their values, and then to perform a math operation of these variables and display the results in a message box. The variables can be declared and set as:

 

'Declare variables and set their values
Dim intX As Integer = 5
Dim intY As Integer = 10

• To perform ...