Unsuccessful finish page
How would I go about making a finish page to display if the installation was not successful, at the moment, even if i dont install anything, it will still take me to the finish page, saying that myapp was installed successfully even though nothing was installed.
I have a few sections that would need to link to this page, such as, if a registry key exists then it means its already installed, therefore go to the unsuccessful finish page which says "MyApp is already installed" or something like that
Cheers