You can inject data into the string that gets sent to the email program, you don't have any control over formatting except for returns and that kind of thing.
Here are a couple of ways of doing it:
var strToAddress, strCCAddress, strSubject, strMessage
strToAddress = txtToAddress.rawValue;
strCCAddress = txtCCAddress.rawValue;
strSubject = txtSubject.rawValue;
strMessage = txtMessage.rawValue;
event.target.submitForm({cURL:"mailto:"+ strToAddress + "?cc=" + strCCAddress + "&subject=" + strSubject + "&body=" + strMessage,cSubmitAs:"PDF",cCharset:"utf-8"});
You can use variables in the following as well:
var oDoc = event.target;
oDoc.mailDoc({
bUI: true,
cTo: "apstory@example.com",
cCC: "dpsmith@example.com",
cSubject: "The Latest News",
cMsg: "A.P., attached is my latest news story in PDF."
});