Does this mail control has a property that defines the type of message body?

>I'm trying to send email from a VFP application (using a 3rd-party mail control) as an HTML document. That is, like the emails you get from Amazon etc where the body of the message is rendered as an HTML document.
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>I have a well-formed HTML document that starts with an HTML tag, but the recipients (in both Outlook and Hotmail) just see all the HTML code instead of the rendered document.
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>Funny thing is, I did this last winter for an HTML Christmas card to some friends, and I had it working then but now I don't remember what I did. Anybody have a suggestion?
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>Thanks - Doug