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Digital Signatures in Excel
Hi there,
I am currently using the Microsoft Office Primary Assemblies for Office XP to write some code in .NET (C#) that allows me to programatically open and sign an MS Office file (Word, Excel and Powerpoint) and to verify if a file is signed or not. I've been able to do it with MS Word documents (using Microsoft.Office.Interop.Word namespace). I open the document, then use wordDoc.Signatures.Add() to add a signature and wordDoc.Signatures.Count to check for signatures. However, I could not see if there's a similar way to do this in Excel. I've been trying to look in the Microsoft.Office.Interop.Excel namespace and haven't yet found a Signatures collection anywhere... In Powerpoint, I noticed there's also a Signatures collection in the Presentation class, but in Excel I did not see anything like that anywhere. Am I missing something ? Am I looking in the wrong places ? Is there a way to programatically add a digital signature to a worksheet or workbook in Excel ? Or it simply can't be done ? Any help you can give would be greatly appreciated. Thanks in advance, Joao Maia |
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