From: dale@cs.rmit.edu.au (Dale Stanbrough)
Subject: Re: Troubles with MessageBeep | Beep...
Date: 1999/07/15
Date: 1999-07-15T09:21:07+00:00 [thread overview]
Message-ID: <dale-1507991921080001@192.168.0.2> (raw)
In-Reply-To: 2461CF0DA7DBD211B07300805F921CBC01D8B985@kuumex03.barco.com
SEV, AV Guest 2" <avguest2@barco.com> wrote:
" procedure Button1_Click is
b : Win32.bool;
begin
b:=Beep(5000,5000);
end Button1_Click;"
Why does it return a boolean?
On a related note, when I am calling a lot of Unix functions, and
don't want to check the return value, I sometimes do the following...
declare
Result : Natural;
begin
Result := F1 (...);
Result := F2 (...);
exception
when constraint_error => <function failed>
end;
...so would
subtype Ok is Boolean range true..true;
Ok := Beep (...);
compile without the constraint check being optimised away (
would that be a legal optimisation)?
Dale
next prev parent reply other threads:[~1999-07-15 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-15 0:00 Re : Troubles with MessageBeep | Beep SEV, AV Guest 2
1999-07-15 0:00 ` Dale Stanbrough [this message]
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1999-07-15 0:00 SEV, AV Guest 2
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