EnhancedTextWriter COM Library

EnhancedTextWriterCOM shows how to extend Microsoft Office with .NET: a C# class library is exposed as a COM object, registered with regasm, and then called from VBA inside a Word document.

What’s in the repository

• EnhancedTextWriterLib (C#): the COM-visible class with a SaveToFile method that writes text from a VBA form to disk.
• EnhancedTextWriter.docm: a macro-enabled Word document with a form that calls the COM object.
• VBA/EnhancedTextWriterVBA.bas: the VBA module demonstrating both binding styles.

Early vs. late binding

• Early binding references the type library directly, giving IntelliSense and compile-time type checking.
• Late binding creates the object at runtime with CreateObject, trading tooling support for deployment flexibility.

The step-by-step walkthrough, including project settings, assembly signing, and registration troubleshooting, is in the tutorial on this site.