Pascal Scripting: PageIndexFromID

Prototype:

function PageIndexFromID(const ID: Integer): Integer;

Description:

Given a page ID, returns an position index. Call this if, for example, you want to check whether a page is positioned before a certain other page.

Example:

function ShouldSkipPage(PageID: Integer): Boolean;
begin
  Result := PageIndexFromID(PageID) < PageIndexFromID(wpReady);
end;