RTF string to NotesRichTextItem?

I have RTF content that I would like to add to the body of new calendar documents. For exmple:

{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Calibri;}}

{*\generator Msftedit 5.41.21.2509;}\viewkind4\uc1\pard\sa200\sl276\slmult1\lang9\f0\fs22 Hello World!\par

}

I’ve tried this:

l_oRTItem = .CreateRichTextItem(“Body”)

l_oRTItem.AppendText(MyRTFString)

But it just displays the literal RTF string.

Any suggestions? Is there a “RTF to NotesRichTextItem” method or function somewhere?

Thanks.

Bill