Conditionaly hide a custom page

Hello to all,

I am creating an installer which detects whether a previous installation of the product already exists. For that task, I created a custom page which gives the user 2 options: Uninstall existing product or Continue without uninstalling. What I want to know is this: is there any way to show or hide this custom page if a condition is met? For example, show page if product is already installed or hide it if this is the first time the product is installed.

Thank you in advance!

Call Abort in a Custom Page's Pre function to skip it. Call Abort in it's Leave function to go back to it.

-Stu