Hi Angelo,
Please note that the
Verify and set the selected folder path - SetTargetPath published event notifies the installer to check and set the selected path. If the path is not valid or the installer doesn't have write access for it, all control events associated with the control are blocked.
Also, the
Installation Path Dialog allows you to select a validation method for the selected installation path. The actual validation is performed when pressing [ Next ] button.
As you can see, the user will not be able to proceed with the installation if an empty path is selected or the selected path does not pass the validation. So, can you please tell us why would you like to add an extra check?
Best regards,
Dan