Easy Screen Capture Class - Capture Screen, Desktop Region, Form, or Controls

[rongage]

I am having a weird problem and was hoping someone could offer a pointer or two...
Consider the following sub:

    Private Sub _timer_Tick(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim sc As New ScreenShot.ScreenCapture
        Debug.Print("Tick: " & Now)
        If rdp.Count > 0 Then
            For Each r As _rdp In rdp
                r.pic.Image = sc.CaptureWindow(r.rdp.Handle).GetThumbnailImage(160, 120, Nothing, Nothing)

            Next
        End If
        sc = Nothing
    End Sub

It triggers every 3 seconds, refreshing the r.pic.image with a screen cap from r.rdp.handle. Pretty straight forward, right? Well, except what is happening is that the resulting image is re-shrunk every iteration so the first image is 160x120, the second is much smaller, the third - even smaller, the fourth is basically a single pixel and from 5 on it is nothing.

If I run without GetThumbnailImage(), the image in the picturebox moves every iteration by roughly 30 pixels in both X and Y.

Anyone ever run into this before?

HELP!

Ron