How to display a message box when a certain app is installed

[ChrisGue]

I need to check, if a certain application is installed.
If so, a message box should be displayed and then the installation being quit.

How can I do that?

thanks,
Chris

[GabrielBarbu]

Hi Chris,

You can use an Extended Search for an Upgrade Code. Then create a launch condition based on the search result property.

Best regards,
Gabriel

[ChrisGue]

thanks a lot, I got that working