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From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: Determining private entires in colormaps
Message-ID: <8908231524.AA02265@expo.lcs.mit.edu>
Date: 23 Aug 89 15:24:02 GMT
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    Is there a generic way to determine which cells in a colormap
    are private (read only) and which are public (read-write)?

I might argue you have your terms backwards, but no, there is no
explict way to determine this.  One very crufty way would be to
grab the server, and then query each cell and try to write it
back.  If you don't get an error, it's writable.  If you do get
an error, though, you can't tell if it's read-only or unallocated.