Workbook.Signatures Property (2007 System)
Gets the collection of digital signatures for the workbook.
Assembly: Microsoft.Office.Tools.Excel.v9.0 (in Microsoft.Office.Tools.Excel.v9.0.dll)
To digitally sign Excel workbooks 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 or later. You can obtain a digital signature certificate from a certification authority.
The following code example gets the number of signatures that are attached to the current workbook and displays an appropriate message to the user.
This example is for a document-level customization.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.