pdfGetInIsSigned

int32_t __stdcall pdfGetInIsSigned(PPDF IPDF);

function pdfGetInIsSigned(const IPDF: PPDF): Integer; stdcall;

Purpose. Report whether the currently open import source document has been digitally signed — an In-prefixed import-inspection getter, following the same convention documented repeatedly elsewhere (pdfGetInFieldCount Field Lifecycle and Enumeration, pdfGetInIsXFAForm XFA Form Fields): it inspects the separate FImportSrc document, not the live document being edited.

Description. Guarded by HasImportFile; returns NO_IMPORT_ERR (-1073742011) if no import file is open. Otherwise checks two independent signals on the import source: the AcroForm /SigFlags bit 0 (SignaturesExist), or the presence of a document-level /Perms entry (used for certification/usage-rights signatures) — either one alone is sufficient to report "signed."

Parameters.

Return value. 1 if either signal indicates the import source is signed; 0 if neither; NO_IMPORT_ERR if no import file is open.

C# (P/Invoke)

public static extern int pdfGetInIsSigned(IntPtr IPDF);