How to pass parameters to a .msg file?

[HereNow]

I have found how to send parameters to the outlook.exe file to create a new message, add an address, a subject, and a body of text:

Run "C:\Program Files (x86)\Microsoft Office\Office14\outlook.exe" /c ipm.note /m emailaddress@server.com;&;subject=Subject&body=Bod y_Of_Text

Now I am curious if I can do the same thing, but to a .msg file. I have a .msg file that will already have the subject and address embedded in it, but I need to figure out if I can pass the body of text into the file when it's opened?