[fpc-devel] types in xlib unit

[Felipe Monteiro de Carvalho]

On 10/3/07, Graeme Geldenhuys <graemeg.lists at gmail.com> wrote:
> In the xlib.pp unit the following types are defined.  How are you
> supposed to work with a record structure that contains nothing?  Does
> it the act like a Pointer type?

It's an opaque structure. You know it's a record, but you don't know
what is inside it =)

An encapsulation techinique common in the c world.

In the end always a pointer to the structure will be used (wither by
really using a pointer or a var parameter), and it is not created or
released on your side of the program, so you don't need to know it's
contents or size or anything else.

-- 
Felipe Monteiro de Carvalho