inno setup - Creating another page and requiring a directory and checking if a specific file exists in that directory -

I have created an INO setup script using the joke, now it's what I want, however, If you want to create a page installation directory selection page after , another directory is required and if the user has selected the directory, then the "Next" button should be enabled only when that directory A specific file exists.

Can it be done in this setup?

short answer: yes it can be done.

For a start:

• Use to create a new page.
• If the user is allowed to move forward, then use it to control it.
• Use this to test if the file exists.