There really isn't any documentation on submitting from a LiveCycle Designer Doc to a server, unless of course it's a LiveCycle server. However, there is no fundamental difference between doing this and submitting data from a regular AcroForm, so you can look up information on this.
All you need is a script on the other side to catch the data, ASP, ASP.NET, Perl, PHP, etc. Doesn't matter. On the LiveCycle PDF form all you need is a submit button. The real trick is in writing the server script. If you don't already know server scripting. you'll need to get a book and read about it. It's outside the scope of this forum. The only thing I can tell you is that Acrobat sends the data as a HTTP Post, with the form data in the body of the HTTP Request. The Mime type of the data is in the HTTP Request Header as it should be.
Thom Parker
WindJack Solutions
www.windjack.com