Public Class Form1          ' Queue demo by Gordon  Jun 11
    Dim queue(5) As Double, pointer As Integer
    Dim i As Integer
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        queue(4) = 56.2
        queue(3) = 23

        pointer = 2
    End Sub
    Private Sub display()

        Label1.Text = ""
        For i = 0 To 4
            Label1.Text = Label1.Text & " " & Str(queue(i))
        Next
    End Sub

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

        queue(pointer) = Val(TextBox1.Text)
        pointer = pointer - 1
        display()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click


        For i = 4 To 0 Step -1
            If i >= 1 Then
                queue(i) = queue(i - 1)
            End If
        Next
        pointer += 1
        display()
    End Sub
End Class