Scroll down in the Functions list box to the Additional Functions section. Locate the User-Defined Function you created.
User-Defined Function names for functions created in Automation Servers are prefixed according to the project and class name used when you created the automation server. For instance, if you named your project CRUFLProject, named the class Conversion, and named the function Square, the User-Defined Function would appear in the Formula Editor as ProjectConversionSquare.