'API declares:
Declare Function PutFocus Lib "user32" Alias "SetFocus" (ByVal hwnd As Long) As Long
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Integer, ByVal lParam As Long) As Long

'Function to scroll virtually any box that has this capability:
Function ScrollText(MyControl As Control, vLines As Integer) as long
       Dim Success As Long
       Dim SavedWnd As Long
       Dim R As Long
       Dim Lines As Double
       Const EM_LINESCROLL = &HB6
       ' Get the window handle of the control that currently has the focus
       SavedWnd = Screen.ActiveControl.hwnd
       Lines = vLines
       ' Set the focus to the passed control.
       MyControl.SetFocus
       ' Scroll the lines.
       Success = SendMessage(MyControl.hwnd, EM_LINESCROLL, 0, Lines)
       ' Restore the focus to the original control.
       R = PutFocus(SavedWnd)
       ' Return the number of lines actually scrolled.
       ScrollText = Success
End Function

'Example on how you use it:
Call ScrollText(Text1, 20)
'This example scrolls the text1 textbox 20 lines downward. If you want to scroll down to the bottom, make sure you specify more lines than max possible content!