Passing structure over d-bus - glib - example

[Trilok Soni]

Hi,

I want to pass "structure" over d-bus, I see that d-bus specification
mentions how to add that
with "(" and ")" notions. But, I am not able to find any example with
dbus low-level apis or dbus-glib binding
demonstrating that functionality. Can any one please point me the same
or example introspection xml
file which I could use with dbus-binding tool to generate the dummy
sever/client code?

Apart from this How do we specify "argument" of the method taking
"void *" as argument, I have to write a method
which take "void *" as argument, what is equivalent in dbus-glib binding type?

-- 
--Trilok Soni