HELP!!! swt + mozilla (adtional questions)

Met more problems when I try to do more things.

As I don't know how to get the webbrowser component, I guess I need call 
nsIComponentRegistrar.autoRegister() with parameter, then I noticed it 
require a nsIFile. Good thing is that XPCOM.dll include a method of 
NS_NewLocalFile(). The NS_NewLocalFile() method require me to pass in an 
nsAString, then I am in trouble -- how could I create an nsAString in 
Java code?

Then I noticed there is a nsIStringService, if I can pass a pointer that 
points to a buffer in ascii or unicode format, then I should be able to 
get a nsAString or nsACString from the nsIStringService. If this is 
possible, I can still move on with only xpcom.dll, and not including 
other mozilla include file or lib file.

So my question here is: how can I get an nsIStringService? What must I 
do before I be able to get it? Must I use nsAString or nsACString before 
I get nsIStringService?


Thanks

jml