function PageFromID(const ID: Integer): TWizardPage;
Given a page ID, returns a TWizardPage instance. Call this if, for example, you need to get at the surface of a page and only know its ID.
An exception will be raised if an invalid page ID is specified.
var Page: TWizardPage; begin Page := PageFromID(wpWelcome); Page.Surface.Color := clBlue; end;