If you specifically want to use Outlook then you would have to use Office Automation, which is not simple. If you want to just use the user's default mail client then it is simple. You just construct the appropriate mailto URL and call Process.Start, e.g.
vb.net Code:
  1. Dim url = "mailto:[email protected]"

  2.  
  3. Process.Start(url)
That is equivalent to clicking on a mailto link in a web page. You can simply construct the URL to contain the parts you want. It's very easy to find information on how to do that on the web.

EDIT: E.g. this was the first result when I searched for "mailto url":

http://email.about.com/od/mailtoemai...o_elements.htm