How to check if my app is already installed ?

Hello,

how can I do the task I wrote in the subject ?

Thank you very much.

Bye Defcon.

You could create a registry entry with your installer, so that if you try to install the same application again you can read that entry and decide if you want to uninstall the previous version or not.
This may also be useful to you.
CF

Thanks. The idea with the registry entry was great 🙂