Build a binary compatible version

Binary compatibility maintains the same registration information between versions of the extension DLL. This will force Visual Basic to always use the same CLSID for your component and allow you to continue modifying your component after you have installed it into the chat service.

1. Save and compile your extension DLL. You can do this before you write any code in your callback implementations, but if you are supporting a property page, you should do this only after you have added your custom administration interface.
2. Copy the extension to a new name, such as "MyExt (BinaryCompatibility).dll"
3. Set binary compatibility for your project (on the Component tab of the Project Properties dialog box) with the file you created in the previous step.

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