VB6 Project - Detect Previous Installation

[VBFnewcomer]

Hi Everybody,
When somebody clicks the setup, how to make the setup detect if the program is already installed and give a msgbox like "Please uninstall existing program to proceed".
The project is built using PDW
:wave:

[randem]

PDW won't do that... You would have to change the source code for that to happen in PDW.