Re: Base64Encode HGLOBAL from clipboard

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.atl,microsoft.public.win32.programmer.ole

Date:

Thu, 12 Jun 2008 08:01:57 -0400

Message-ID:

<u5q7eQIzIHA.4912@TK2MSFTNGP03.phx.gbl>

"Jeff" <jeff.hillman@gmail.com> wrote in message
news:47272150-358f-4dcb-9616-485bb12dab03@i36g2000prf.googlegroups.com

I am trying to base64 encode some binary data stored on the
clipboard. The resulting string will be stored in an XML file. The
data is a PNG image, and the string I get from ATL::Base64Encode seems
to be very wrong. The data on the clipboard seems to be fine, and I
believe that I am retrieving it correctly, but the string has several
invalid characters at the end ("????????????????"), and there are no
'=' characters.

Base64EncodeGetRequiredLength returns the required length without
terminating NUL character, and Base64Encode doesn't write it. Hence the
"invalid characters at the end" - it's random garbage beyond the end of
the buffer.

As to no '=' characters, you explicitly asked for them not to be there,
by specifying ATL_BASE64_FLAG_NOPAD flag.
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925