property FormType;
Tells you whether the document contains AcroForm fields, XFA, or no forms at all.
Read-only; useful to decide whether to enable form-editing UI.
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 before calling page-scoped operations; methods that require an open document raise EPdfError otherwise.SaveToFile to persist.
if Pdf1.Active then
Pdf1.FormType;