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

• Understanding Excel Services UDFs
  Learn about managed-code UDFs, including required attributes, deployment, and security.

• Walkthrough: Developing a Managed-Code UDF
  Get step-by-step instructions on developing Excel Services UDFs using Microsoft Visual C#.

• Frequently Asked Questions About Excel Services UDFs
  Find answers to the most common questions about Excel Services UDFs.

• How to: Enable UDFs
  Learn how to enable UDFs and allow them to be called from an Excel workbook.

• How to: Create a UDF that Calls a Web Service
  Learn how to call an external Web service from a UDF.

• How to: Access an External Data Source From a UDF
  Get an example showing how to access an external database from a UDF.

• How to: Deploy UDFs Using Windows SharePoint Services Solutions
  Learn how to deploy a UDF by using the Windows SharePoint Services solution framework.

• How to: Restrict UDF Code Access Security Permissions
  Learn how to create a custom code group and restrict permission for a UDF assembly by using the .NET Framework 2.0 Configuration tool.

Reference

• Microsoft.Office.Excel.Server.Udf
  Excel Services UDF attributes.