Opening a new outlook message window (and post body) from PB App

I spent days searching the web but cannot find an answer, so you are my last hope :-)

I want to open an outlook "new message" window and fill it out with information from the database, in this case: subject and mailbody.

I came across "rundll32 url.dll,FileProtocolHandler mailto:....." which works well, unless the mailbody-size goes over the limit for command line calls (which seems to be around 1800 chars).

Does anybody have another idea to solve this? I've tried OLE automation but my users didn't like the outlook security requests. But if that's the only solution I would be happy about any help on that too.

Thanks,
Oliver