Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!well!wdh
From: wdh@well.sf.ca.us (Bill Hofmann)
Newsgroups: comp.sys.mac.programmer
Subject: Re: window
Message-ID: <24737@well.sf.ca.us>
Date: 12 May 91 18:05:47 GMT
References: <1991May9.074917.19604@midway.uchicago.edu>
Organization: Flashpoint
Lines: 23

In article <1991May9.074917.19604@midway.uchicago.edu> hui@control.uchicago.edu writes:
>
>    I am new to mac programming, this maybe a trivial question but I need
>help. How to get the WindowRecord from a WindowPtr? Someone suggest
>(WindowPeek)mywindow but it doesn't seem to work, and how to find the current
>front window(active one)? Thank you very much.

Isn't C operator precedence fun?  The problem here, most likely, is that
the cast has a lower precedence than the dereference, so to, for instance,
look at the windowKind field, you need to say:

	((WindowPeek)mywindow)->windowKind

Note that that's about the only WindowRecord field you should every get
at in that fashion, unless you're doing stuff with zooming windows.  Use
GetWRefCon and SetWRefCon for the refCon field, GetWTitle and SetWTitle for
the window title, etc.

FrontWindow() returns the WindowPtr of the frontmost (active) window.  Note
that if you're running single finder, this may not be your winodw, it may
be a DA window.

-Bill Hofmann