Returns a object that represents the digital signatures for a document.
Assembly: Microsoft.Office.Interop.Word (in Microsoft.Office.Interop.Word.dll)
To digitally sign Microsoft Word documents and verify other signatures in them, you will 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.