How to Create a DLL

This article describes how to implement a component as a dynamic-link library (DLL) in Microsoft DirectShow. This article is a continuation from How to Implement IUnknown, which describes how to implement the IUnknown interface by deriving your component from the CUnknown base class.

This article contains the following sections.

• Class Factories and Factory Templates
• Factory Template Array
• DLL Functions

Registering a DirectShow filter (as opposed to a generic COM object) requires some additional steps that are not covered in this article. For information on registering filters, see How to Register DirectShow Filters.