Gets a SignatureSet that represents the digital signatures for the document.
Assembly: Microsoft.Office.Tools.Word.v4.0.Utilities (in Microsoft.Office.Tools.Word.v4.0.Utilities.dll)
To digitally sign Microsoft Office Word documents and verify other signatures in them, you need the Microsoft CryptoAPI and a unique digital signature certificate. The CryptoAPI is installed with Microsoft Internet Explorer 4.01 and higher. You can obtain a digital signature certificate from a certification authority.