Excel Services User-Defined Functions
This section contains information about user-defined functions (UDFs) and how to use UDF attributes in your code.
In this section
Learn about managed-code UDFs, including required attributes, deployment, and security.
Get step-by-step instructions about developing Excel Services UDFs by using Microsoft Visual C#.
Find answers to the most common questions about Excel Services UDFs.
Learn how to enable UDFs and allow them to be called from an Excel workbook.
Learn how to call an external Web service from a UDF.
Get an example showing how to access an external database from a UDF.
Learn how to deploy a UDF by using the s solution framework.
Learn how to create a custom code group and restrict permission for a UDF assembly by using the .NET Framework Configuration tool.
Excel Services UDF attributes.