Can someone tell me the syntax to add a RichTextBox control to a coded form class?

I can get the RichTextBox on the form and show it, but I can't set the ScrollBar property or anything else that falls under the Object reference, because they are read-only.

DEFINE CLASS myForm AS FORM
ENDDEFINE
DEFINE CLASS rtb AS OLECONTROL
oleclass = "RICHTEXT.RichTextCtrl.1"
width = 300
height = 300
scrollbars = 3 && this creates a new property. I need the one under .Object.Scrollbars?????????/
ENDDEFINE

Thanks!