userdata

Hello

I've recently implemented lua into my 3d engine without any bother. In fact it couldn't have been easier. I'm a little stuck when it comes to userdata though.

Say I have a structure like...

typedef struct

{
int plop;

}Foo, *lpFoo;

And then i have some c code like...

Foo bar;

MyFunction( &bar );

And I'd like my lua script to be as close to this as possible. I'm guessing I have to user the userdata type but I'm struggling to work out how. Is there a way to do this? Is there a tutorial on using userdata? I can't find one specific to it.

Thanks

scott