Hi Everyone!

I've been trying to change the image in a picture box. It works if I want to change it with one image, but I can't get it to change to the other image. It 

should alternate between the two images when I click the button.

Here is my code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)  Handles Button1.Click

    Dim num As Boolean

    If num = False Then

        PictureBox3.Image = My.Resources.Beep

        num = True

    Else

        PictureBox3.Image = My.Resources.Skateboard

        num = False

    End If

End Sub

I've been trying to figure out why it doesn't work for a long time, any help wouldbe appreciated.

Thanks in advance!