Re: Changing case "message" to "MESSAGE"

Pete Becker <>
Fri, 16 Nov 2007 08:29:52 -0500
On 2007-11-16 05:18:08 -0500, Michael Bell <> said:

In message <o85%i.123$_X2.18@newsfe06.lga>
          "Jim Langston" <> wrote:

"Michael Bell" <> wrote in message

In message <2007111510525016807-pete@versatilecodingcom>
Pete Becker <> wrote:

On 2007-11-15 10:49:03 -0500, Michael Bell <>

But I left caps lock on, and by mistake typed MESSAGE, and it didn't
compile. I retyped message in lower case it did compile! I was
astonished. I thought you could give variables any name you liked,
capitalised or not.

What's the explanation? Is MESSAGE a reserved word?

No. It's probably a macro that's defined in "vcl.h".

I was unable to test this theory because it won't complile without
#include <vcl.h> at the top - the error message gives a linker error
and quotes vcl.h. And I can't trace A macro "MESSAGE" in "Borland
Builder C++ 5 for Dummies" - but that's not proof.

It doesn't matter too much. I can still get on with the book. But I
don't like it when something happens that I don't understand. But your
suggestion allows me to lay that worry aside.

So opne up hte file vcl.h and search for MESSAGE

I can't search vcl.h itself, or at least I don't know how to, but I
have searched the help for it, and there is a macro called "MESSAGE"
(UPPER CASE) so your suspicions are well founded and I know how I have
tripped over an obstacle that I had no reason to suspect was there.
All sorted then. Thank you everybody.

A more general test would be to add

#undef MESSAGE

after the #include directive. But for simple programs like this one,
you don't need vcl. And your code will compile without vcl. You have to
find the compiler settings that get rid of whatever non-standard thing
is getting in the way.

Roundhouse Consulting, Ltd. ( Author of "The
Standard C++ Library Extensions: a Tutorial and Reference

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