A code signing certificate can be used to sign content produced by several Microsoft® Office applications such as Word®, Excel® and PowerPoint®.
Before you get started, make sure the code signing certificate and private key are in the Windows certificate store. Refer to Installing Code Signing Certificate in Windows for installation instructions.
By default, Windows® XP and Windows 7 do not add a time stamp to the certificate.
If you would like to allow people to continue using your signed Visual Basic® for Applicaions (VBA) code after the certificate expires, modify the registry on your code-signing computer to add a time stamp at the time of signing using the following keys: