Aspose::Words::DigitalSignatures::DigitalSignatureUtil::Sign method. Signs source Document using given CertificateHolder with digital signature and writes signed Document To destination stream. Supported formats are: Doc, Dot, Docx, Dotx, Docm, Odt, Ott.Output will be written To the start of stream and stream size will be updated with content length in C++.... Supported formats are: Doc , Dot , Docx , Dotx , Docm ,...stream. Supported formats are: Doc , Dot , Docx , Dotx , Docm ,...