Re: How to avoid multiple instances of a program in NT and 95?

Article View: comp.os.ms-windows.programmer.misc

Article #2929

Back to comp.os.ms-windows.programmer.misc Previous Next

#2929

From: Heiner Eichmann
Date: Wed, 05 Feb 1997 00:00

29 lines
1647 bytes

raymondc@microsoft.com.--- (Raymond Chen) wrote:

>This still won't work if a second instance is started before the
>first gets a chance to create its window.

>Create a named event and check if you get ERROR_ALREADY_EXISTS
>from GetLastError.

Hi!

What happens if the program crashes before it can release the event?
It is improbably also possible that a different program uses the same 
name for an event.

What about this:

Open your own EXE file for read access and do not allow other
tasks to open the file. If this fails someone als has a lock on
this file and another instance is still running.

Yours

Heiner Eichmann
Inst. of Quantum Optics
University of Hanover, Germany
h.eichmann@mbox.iqo.uni-hannover.de

Technical Details

Message-ID: <5da29d$bs$2@newsserver.rrzn.uni-hannover.de>

Path: arc1-ca.pugleaf.net!unknown!not-for-mail

References: <5d4eeb$n6u$1@euler.space.net> <aFwHpCAU3e9yEwa8@ormesci.demon.co.uk> <32f7e6e5.422962@157.55.96.156>

Show Full Headers

Complete Article Headers

X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 1124cf,3403ef0501dd273
X-Google-Attributes: gid1124cf,public
X-Google-Thread: 113dfb,3403ef0501dd273
X-Google-Attributes: gid113dfb,public
X-Google-Thread: 105df1,3403ef0501dd273
X-Google-Attributes: gid105df1,public
X-Google-Thread: f6ef4,3403ef0501dd273
X-Google-Attributes: gidf6ef4,public
From: h.eichmann@mbox.iqo.uni-hannover.de (Heiner Eichmann)
Subject: Re: How to avoid multiple instances of a program in NT and 95?
Date: 1997/02/05
Message-ID: <5da29d$bs$2@newsserver.rrzn.uni-hannover.de>
X-Deja-AN: 214609490
references: <5d4eeb$n6u$1@euler.space.net> <aFwHpCAU3e9yEwa8@ormesci.demon.co.uk> <32f7e6e5.422962@157.55.96.156>
organization: Inst. f Quantenoptik, Uni Hannover
newsgroups: comp.os.ms-windows.programmer.misc,comp.os.ms-windows.programmer.win32,de.comp.os.ms-windows.programmer,fido.ger.windows.prog

Reply to Parent Message