Two Delphi 2 questions

How can I:
1) delete the program file of currently running application
2) check the previous running instance of the application and how to select the running application when attempting to run it twice

... both in Delphi 2

... thanx, Bocian
BocianAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

icampbe1Commented:
1) I really dont think you can (nor should you be able to).  The program file is treated as a mapped file for the running program.  If you dont have the EXE then you dont have the mapped file, then you dont have the program.  You can't detach the running code (just because it may all be in memory) from the EXE file.

2) Use a Mutex.  If a Mutex is created with CreateMutex(), the lpName parameter holds a unique string identifier.  All of the programs that you want a single instance of should try and call OpenMutex().  OpenMutex will only work if someone actually created the Mutex first with CreateMutex.

Of course, there are kludgier ways like using FindWindow, but that relies on a unique window class or caption name.

Hope this helps...  Cheers,

Ian C.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
gysbert1Commented:
If you really have to delete the .exe you will have to use a killer .exe shipped with the app, maybe cat'ed to the first one and then dinamically written to a file by your app if you know how to do this. Your app will then execute the killer and exit itself. The killer will wait till the app is shut down and then delete the exe.

I used to do stuff like this in high school. Great fun trying to write incrackable copy protection, etc ...
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.