How can I slide a long text?

I don't know if this can be done by API, but anyway...
I am making a very little application which consists in sliding a text. The text is in a RichTextBox and I need to control every pixel movement, so I can not use SendMessage because the minimum slide is 1 line of text. So, the only way I have found is by moving the control itself up and down, but the maximum height admitted by VB is not long enough for the lenght of the text. What can I do?
I have also thought of translating the text into HTML and using a web-browser control to contain it (I have noticed that Internet Explorer lets you move the page pixel by pixel using the ScrollBar), but I have not found any control that gives its hWnd, needed by SendMessage.
Could you help me? Thanks a lot.

Put this code in a Timer event. I've scrolled much longer lines than the one in this example using this routine:

Const MyStr = "This program was written in Visual Basic 6.0 with an Access 2000 database."

Static TopText As Integer
Static TopLoaded As Boolean

Dim Speed As Integer
Dim NotShowing As Long

'speed is one pixel per tick
Speed = Screen.TwipsPerPixelY

If Not TopLoaded Then
'only set this once
TopText = Picture2.ScaleHeight
TopLoaded = True
End If
'clear picture box text
Picture2.Cls

'center the text about to be displayed
Picture2.CurrentY = TopText
Picture2.CurrentX = (Picture2.ScaleWidth \ 2) - (Picture2.TextWidth(MyStr) \ 2)

'display text
Picture2.Print MyStr

'if text has moved past the top of the picture box
'then start scrolling text from the bottom
NotShowing = (TopText + Picture2.TextHeight(MyStr))
If NotShowing < 0 Then
TopText = Picture2.ScaleHeight
Else
'else continue moving text up
TopText = TopText - Speed
End If