Path: utzoo!mnetor!uunet!husc6!mit-eddie!apollo!oj
From: oj@apollo.uucp (Ellis Oliver Jones)
Newsgroups: comp.windows.x
Subject: Re: help
Message-ID: <3a201957.d5b2@apollo.uucp>
Date: 6 Feb 88 18:37:00 GMT
References: <8802051638.AA21206@devnull.sun.com>
Reply-To: oj@apollo.UUCP (Ellis Oliver Jones)
Organization: Apollo Computer, Chelmsford, MA
Lines: 15

>> How do I check if a window 
>> is an Icon?

You can find out whether your window is mapped or not via Xlib's
XGetWindowAttributes request.  Being unmapped is not, strictly speaking, exactly the same
thing as being iconized.  However, if you're inquiring about a top
level window mapped by you (by some request or toolkit operation in your
program), but never unmapped by you, it's a safe bet that the window manager
unmapped it.  If all you want to know is whether to refrain from drawing because
your window's unmapped, this is a winning strategy.

If you're using Xlib instead of the toolkit (you are?  fie!) 
you can easily solicit events using StructureNotifyMask and keep track of
MapNotify/UnmapNotify events.
/oj