Picturebox Reshape at runtime

After playing with the code below for a few days I stumped at whats going wrong
with the routine. Since this is a part of a larger project I broke the code down to a small section to run on a test form to debug the problem.

Its very basic a form with a picture box 164 by 130 pixels. I use a solid color box to get a better view of what going on.

If you try the code it will shrink the box just like I wanted. But then when I reverse the process it goes all wrong.

Any suggestions would be a greatly appreciated...

Public Class Form1

    Public PBH As Integer
    Public PBW As Integer
    Public times As Integer
    Public locx As Integer
    Public locy As Integer

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Timer1.Enabled = True ' Turn On Timer Tick

        PBH = 130 ' Set Picturebox height to 130

        PBW = 164 ' Set Picturebox width to 164

        times = 10 ' Number of timer to run routine before exit

        locx = 60

        locy = 60

    End Sub

    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

        Do                           ' start main loop to shrink PB1

            PictureBox1.Height = PBH ' Reset Picturebox 1 Height
            PictureBox1.Width = PBW '  Reset Picturebox 1 Width

            PictureBox1.Location = New Point(locx, locy) ' Reset x.y pos

            PBH = PBH - 1 : PBW = PBW - 1 : locx = locx + 1 : locy = locy + 1 ' Decrease size of PB increase location x,y

            Call Delay() ' Slow down graphics for effect

            If PBH > 0 Then Continue Do ' Keep making it smaller if limit not reached

        Loop Until PBH = 0  ' If limit is reached then move to next loop

        PBH = 1 : PBW = 35 ' Reset starting points for Picturebox 1

        Do                           ' Start to make PB1 Larger again

            PictureBox1.Height = PBH ' Reset Picturebox 1 Height
            PictureBox1.Width = PBW '  Reset Picturebox 1 Width

            PictureBox1.Location = New Point(locx, locy) ' Increase location x,y

            PBH = PBH + 1 : PBW = PBW + 1 : locx = locx - 1 : locy = locy - 1 ' Increase size of PB1

            Call Delay() ' Slow down for graphics effect

            If PBH < 130 Then Continue Do ' Keep going until limit is reached

        Loop Until PBH = 130 : Timer1.Enabled = False ' Once limits is reached turnoff timer tick

    End Sub

    Public Sub Delay()

        For t = 1 To 2500000 : Next t

    End Sub

End Class

Tags: Visual Basic (Visual Basic 8 (2005))