Thanks for your posting and using Aspose.Cells.
We are afraid, this is a new feature and currently not available. Therefore, we have logged a New Feature request in our database for investigation. We will look into it and implement it if possible. Once the feature is available or we have some other update for you, we will let you know asap.
This issue has been logged as
- CELLSNET-44219 - Password protect the VBA project
That’s great! We’re looking forward to it.