The aims of this example is to show you the different ways you can make choices.

Examples of code structures that allow you to make choices.
Preparations
Create a new Windows Forms Project
Add a text box called ColorTextBox
Add a Picture box called SquareBox

Aim of next 4 examples
If user enter a preset color into the text box, change the color of the Square to that color. Otherwise it white

Example 1: IF {Condition} THEN {Matches Condition Code} ELSE {Doesn't Match Code} END IF
Add a button, change its text to "Example 1: IF" (Without the quotes of cause.)
Double click on the button

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ' Example 1: IF
        If Me.ColorTextBox.Text = "RED" Then
            Me.SquarePB.BackColor = Color.Red
        Else
            Me.SquarePB.BackColor = Color.White
        End If
        If Me.ColorTextBox.Text = "GREEN" Then
            Me.SquarePB.BackColor = Color.Green
        Else
            Me.SquarePB.BackColor = Color.White
        End If
        If Me.ColorTextBox.Text = "BLUE" Then
            Me.SquarePB.BackColor = Color.Blue
        Else
            Me.SquarePB.BackColor = Color.White
        End If
    End Sub

Example 2: IF {Condition1} THEN {Matches Condition Code} ELSEIF {Condition2} ELSE {Doesn't Match Code} ENDIF
Add another button
Change text to "Example 2: IF .. ELSEIF ... ELSE ... ENDIF"
Add the code

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        ' Example 2: IF ... THEN ... ELSEIF ... ELSE ... END IF
        If Me.ColorTextBox.Text = "RED" Then
            Me.SquarePB.BackColor = Color.Red
        ElseIf Me.ColorTextBox.Text = "BLUE" Then
            Me.SquarePB.BackColor = Color.Blue
        ElseIf Me.ColorTextBox.Text = "GREEN Then" Then
            Me.SquarePB.BackColor = Color.Green
        Else
            Me.SquarePB.BackColor = Color.White
        End If
    End Sub

Example 3: Variant of IF THEN
Add another button
Change text to "Example 3: Variant IF .. THEN ... ENDIF"
Add this code

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ' Example 3: Variant of IF ... THEN ...
        Me.SquarePB.BackColor = Color.White
        If Me.ColorTextBox.Text = "RED" Then Me.SquarePB.BackColor = Color.Red
        If Me.ColorTextBox.Text = "BLUE" Then Me.SquarePB.BackColor = Color.Blue
        If Me.ColorTextBox.Text = "GREEN Then" Then Me.SquarePB.BackColor = Color.Green
    End Sub

Example 4

SELECT CASE {value}
CASE {Condition 1}: {Matches Condition Code}
CASE {Condition 2}: {Matches Condition Code}
CASE ELSE
{Doesn't Match Code}
END CASE

Add another button
Change text to "Example 4: SELECT CASE"
Add this code

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        ' Example 4: Select Case ... Case ... End Select
        Select Case Me.ColorTextBox.Text
            Case "RED" : Me.SquarePB.BackColor = Color.Red
            Case "BLUE" : Me.SquarePB.BackColor = Color.Blue
            Case "GREEN" : Me.SquarePB.BackColor = Color.Green
            Case Else : Me.SquarePB.BackColor = Color.White
        End Select
    End Sub

IIF({Condition} , {Matches Code} , {Doesn't Match Code})
Example: Negative or Positive

Add to form another Text box call it NumberTextBox, with text "NEGATIVE OR POSITIVE"
Add another picture box to the form call it NegativePB
Add another button.

    'Example 5: IIF
    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumberTextBox.TextChanged
        ' This makes sure only a number enables the button.
        If System.Text.RegularExpressions.Regex.IsMatch(Me.NumberTextBox.Text, "^(-?\d+.\d|^-?\d)$") Then
            Me.Button5.Enabled = True
        Else
            Me.Button5.Enabled = False
        End If
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        ' Example 5: IIF - The inline if statement
        Me.NegativePB.BackColor = IIf(Val(Me.NumberTextBox.Text) < 0, Color.Red, Color.Black)
    End Sub

CHOOSE({value} ,{=1 Code}.{=2 Code}, etc)
Value must greater or equal to one.

Example: Medals
Add to the form another button
Add to the form another picture box called MedalPB
Add a radio button with text "First", checked is true
Add a radio button with text "Second", checked is false
Add a radio button with text "Third", checked is false

' Example 6: Using CHOOSE
    Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
        If Me.RadioButton1.Checked Then MedalState = 1
    End Sub

    Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged
        If Me.RadioButton2.Checked Then MedalState = 2
    End Sub

    Private Sub RadioButton3_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton3.CheckedChanged
        If Me.RadioButton3.Checked Then MedalState = 3
    End Sub
    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        Me.MedalPB.BackColor = Choose(MedalState, Color.Gold, Color.Silver, Color.Brown)
    End Sub
    Dim MedalState As Double = 1

I hope you have found this helpful.

Attached Project
Tutorial Project in a ZIP
 ChoicesTutorual.zip ( 59.1k ) Number of downloads: 102

Great tutorial for explaining the basics. Good work.