From e42c65610bffe75f510b09e19e1ce7263befb3fb Mon Sep 17 00:00:00 2001
From: kichik
The pre function is called first and allows you to initalize variables or decide - wehther the page should be skipped. Then, the shown function is called, which can + whether the page should be skipped. Then, the shown function is called, which can be used to customize the interface. Finally, the user input can be validated leave function. The NSIS Users Manual provides more information about these functions.