Loading more than 1 copy of the program?

One of my programs runs on networks - some where the .exe sits on the server and others where the .exe is distributed around the network.

Recently some users (the impatient ones) have managed (by repeated clicking) to load more than one copy of the program onto their work station at the same time. Is there any clever way of stopping this happening without causing problems to those who want to have the .exe just on the server?

Once into the program I can stop two users using one each other's data - that isn't the problem. It is just the loading.

Thanks...

This is a well-documented topic. What programming language/framework are you using?

I am using VB6. I have obviously been looking at the wrong documents!

Thread moved to 'VB6 and Earlier' forum

A few methods are explained in the article How can I allow only one instance of my application to run at a time? from our Classic VB FAQs (in the FAQ forum, which is shown near the top of our home page)

Thanks a lot. That seems very straightforward. I shall take time to read all the other FAQs so that I won't ask any FAQ again.

Many thanks

I have tried that code. It is very easy.

Just one further question. I am sorry if the answer is obvious.

I fully understand (and have tested) that it works on a stand-alone machine and assume that it works where the .exe is on each workstation.

However, if a number of workstations are running the program from a single .exe on the server, will they be trapped by this code.

Thanks

No they wont, the checks are only done on the machine that the program is actually running on - it doesn't matter that the program is stored in a shared location.

Thanks for that. I shall get stuck in now and make it happen!