[marco3k]

Hola

Sólo un comentario adicional, los pdf protegidos para imprimir, copia de contenido, cambio de documento, etc. A pesar de tener esas protecciones, son fáciles de romper con programas para desbloquear pdf (que por cierto hay varios que hacen este cometido).
Por cierto en la biblioteca Synopse que menciona Dec encontre estas constantes que haces referencia a un objeto TPdfEncryptionPermissions, quizas ahi pueda estar tu respuesta BuenaHonda.



SynPdf.pas

Código Delphi [-]
const
  /// allow all actions for a pdf encrypted file
  // - to be used as parameter for TPdfEncryption.New() class method
  PDF_PERMISSION_ALL: TPdfEncryptionPermissions =
    [Low(TPdfEncryptionPermission)..high(TPdfEncryptionPermission)];

  /// disable modification and annotation of a pdf encrypted file
  // - to be used as parameter for TPdfEncryption.New() class method
  PDF_PERMISSION_NOMODIF: TPdfEncryptionPermissions = [epPrinting,
    epContentCopy, epPrintingHighResolution, epFillingForms,
    epContentExtraction, epDocumentAssembly];

  /// disable printing for a pdf encrypted file
  // - to be used as parameter for TPdfEncryption.New() class method
  PDF_PERSMISSION_NOPRINT: TPdfEncryptionPermissions = [epGeneralEditing,
    epContentCopy, epAuthoringComment, epContentExtraction, epDocumentAssembly];

  /// disable content extraction or copy for a pdf encrypted file
  // - to be used as parameter for TPdfEncryption.New() class method
  PDF_PERMISSION_NOCOPY: TPdfEncryptionPermissions = [epPrinting,
    epAuthoringComment, epPrintingHighResolution, epFillingForms];

  /// disable printing and content extraction or copy for a pdf encrypted file
  // - to be used as parameter for TPdfEncryption.New() class method
  PDF_PERMISSION_NOCOPYNORPRINT: TPdfEncryptionPermissions = [];
{$endif USE_PDFSECURITY}

Suerte