How can I work with pointers?

[Darrell]

I'm trying to work with the Director interface to Scite.
It works with windows messages.
http://www.scintilla.org/SciTEDirector.html

So I have a message handler like so...
def OnDirector(self, hwnd, msg, wparam, lparam):
        print 'Director hit', hex(msg), hex(wparam), hex(lparam)

Which produces this:
    Director hit 0x4a 0x14024e 0x12fa7c

Scite used this to send that message:
   ::SendMessage(wDestination, WM_COPYDATA,
                 reinterpret_cast<WPARAM>(wReceiver),
                 reinterpret_cast<LPARAM>(&cds));

My problem is how to recover the struct pointer cds.
How do I follow the pointer?
The struct module doesn't seem to provide this.

--Darrell