procedure DeletePage(PageNumber: Integer);
Tar bort sidan på PageIndex från dokumentet.
Indices shift down after deletion; iterate top-down to delete several pages safely.
Wraps the corresponding PDFium API and exposes it as a TPdf instance member so consumers do not have to manage FPDF_DOCUMENT handles directly.
Pdf1.Active innan du anropar sidomfattande operationer; metoder som kräver ett öppet dokument kastar EPdfError otherwise.SaveToFile to persist.
if Pdf1.Active then
Pdf1.DeletePage;