This property is read-only..

By default, the identifier letter assigned to the function definition is adopted, but this can be overwritten.

This property is used as part of a name. In order to set it, member NameParts must be used on object which name will be changed. Additionally for setting this property on a Page object, a function Page::SetName() or the Page constructor can be used.

Reference

FunctionBasePropertyList Class
FunctionBasePropertyList Members