How do I make a " jumping " code in VS 2010 ?

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hi guys
I'm developing my 1st game in VB and i need to learn some ideas about making objects jump when i press a specific button
here is the code for only moving a car
i need the car to jump when i press UP button
any ideas ?

What I have tried:

Public Class Form1
    Dim x As Integer = 1, y As Integer = 1, speed As Integer = 1
    '=========================================
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        MovemenT.Enabled = True
    End Sub

    Private Sub MovemenT_Tick(sender As Object, e As EventArgs) Handles MovemenT.Tick
        PictureBox1.Left -= speed
        Select Case x
            Case 1
                PictureBox1.Image = My.Resources.Car2
                x += 1
            Case 2
                PictureBox1.Image = My.Resources.Car3
                x += 1
            Case 3
                PictureBox1.Image = My.Resources.Car4
                x = 1
        End Select
    End Sub
End Class