Integrating with IBM Lotus Symphony from Java/.Net/XPages applications

Following link contains the sample code to work with IBM Symphony via COM object. The same object can be called from Visual Studio as well.

http://www-10.lotus.com/ldd/lswiki.nsf/dx/Lotus_Notes_and_Lotus_Symphony_and_COM_Objects_How_to_Create_your_Lotus_Symphony_Integration_for_Clients_without_the_Embedded_Client

Also, since Lotus Symphony is built on top of OpenOffice and supports ODF formats. I would suggest using ODF specific packages available on OpenOffice site. The output will be rendered correctly on Symphony.
http://www.openoffice.org/udk/common/man/tutorial/office_automation.html
http://wiki.services.openoffice.org/wiki/Documentation/BASIC_Guide
http://www.kalitech.fr/clients/doc/VB_APIOOo_en.html

There are Java and Lotuscript Toolkit available for Symphony related development:
http://www.johndavidhead.com/jhead/johnhead.nsf/dx/introduction-to-the-lotus-symphony-lotusscript-api

The Lotuscript code which is very near to VB code or else can call the Java classes directly from the .Net code.
http://stackoverflow.com/questions/5928200/call-java-method-from-api-in-net

If someone wants to extend Lotus Symphony functionality, you can write extensions as well:
http://www-10.lotus.com/ldd/lswiki.nsf/dx/10272008093319AMDDRMDU.htm