Solved

Instances in Delphi 2

Posted on 1997-07-03
2
199 Views
Last Modified: 2010-04-06
How do I make sure my program will not run another instance of itself?
0
Comment
Question by:Evil
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 1

Accepted Solution

by:
Gabor earned 50 total points
ID: 1338148
The easiest way is to use a so called global atom.When your program starts you can look for your unique global atom to determine if your program is already running with then following line:- if GlobalFindAtom('MyProgramsUniqueAtom')=0 then begin    {not running}    {Let's make the atom, because this instance is the first}    GlobalAddAtom('MyProgramsUniqueAtom');  end else begin    {running}    {You can close your current instace here for example}  end;Before your (unique) instance finished you have to free the global atom with this line:- GlobalDeleteAtom(GlobalFindAtom('MyProgramsUniqueAtom'));This clears the atom, so you can now rerun your application.
0
 
LVL 1

Expert Comment

by:Gabor
ID: 1338149
Sorry Evil, but my CR-s disappeard. I don't know why.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question