[This is preliminary documentation and subject to change.]
Best Practice (Designed for Microsoft® Windows® Logo)
Authors of ActiveX™ controls should provide support for automatic code download. If the control is a single file, no additional work is required. If multiple files are required, a .cab, .inf, or a self-extracting executable should be provided.
For more information, see the Internet Component Download specification in the Microsoft ActiveX SDK, at http://www.microsoft.com/IntDev/sdk.