How to add a listener on a nsIWebBrowserStream

Hello,

I'm developping an SWT software with the Browser Widget. The soft is use 
to render some XML files loaded in memory.

I'm using the nsIWebBrowserStream interface but I have a huge problem. I 
cannot add any listeners to know when the stream has been complete load
to access to the DOM.

Is there any way to synchronize the closeStream method with the DOM ?


Thx!