Re: Revised proposal for "Missing character" glyph

From: Doug Ewell (
Date: Sun Sep 01 2002 - 15:02:25 EDT

<Peter_Constable at sil dot org> wrote:

> A couple of corrections. First, if an app supports only WM_CHAR and
> not also WM_UNICHAR, that does not imply that it uses a legacy
> encoding. If running on NT/2K/XP and registered as a wide (Unicode)
> app, the WM_CHAR messages will supply UTF-16 code units. If running
> on Win9x/Me and registered as an ANSI app, the WM_CHAR messages
> supply codepoints in some Windows codepage, but the app can still
> store text as Unicode if it takes the WM_CHAR data and immediately
> converts it.
> Secondly, the question of whether an app supports WM_UNICHAR in
> addition to WM_CHAR has no direct bearing on what it puts onto the
> clipboard -- the two are independent. If an app encodes text as
> Unicode, though, it is true that it would probably include Unicode-
> encoded plain text among the formats it copies to the clipboard.

Thanks for the corrections. I haven't actually played around with this
very much, and I thought I understood more than I did about Unicode on
the clipboard. (As I mentioned earlier, I should have said CF_TEXT and

The collected knowledge on this list is a real treasure, very helpful
and enlightening. Thanks.

-Doug Ewell
 Fullerton, California

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