Hello, I strongly suggest you contact you Blue Prism consultant/mentor if there is functionality missing that you need in our MS Excel VBO object, rather than creating a duplicate object. Remaining with our certified VBO will ensure you are using a fully supported interface.
If you want to create your own code stages, I recommend the following:
Please read the guide to using code stages in the Product Documentation section of the portal. It is called Blue Prism Data Sheet - Extending Automations using the .NET Framework
The MS Excel VBO has global code and code options that you have not transfered to your new object. There are instructions about these in the above guide (they are accessed via the object properties box in the initialise page.