Markus,

This first link point to an article that covers a gambit is automation
issues and sample with Office (varies languages and versions). Please, the
"Office Add-ins and Components" section of this document as alternate
approach to use XL Templates (*.xlt's).

Name: Microsoft Office Development with Visual Studio
Link:
http://msdn.microsoft.com/library/de...hart/VSOfficeD
ev.htm

The Links list below will assist you in your Category.

Name: How to Add a New Category to Function Category List
Link: http://support.microsoft.com/default...b;EN-US;137526

Name: Custom Function in the Wrong Category in Function Wizard
Link: http://support.microsoft.com/default...b;EN-US;141825

Name: XL97: Options Not Available in Macro Options Dialog Box
Link: http://support.microsoft.com/default...b;EN-US;157108


Regards,

Sonny Kocak

Microsoft Developer Support

This posting is provided "AS IS" with no warranties, and confers no rights.