Dynamically adding internal frame to desktop pane

Greetings,

I am new to swixml and would like any examples.

Specifically, I would like to create a desktoppane and then depending on
user action draw new internal frames.

There is the one layout example that comes with the code that has fully
defined a desktoppane and internalframes in the XML file. But how would I
add internalframes after I instantiated the desktoppane and any initial
internalframes?

Regards,

Dave