This member function is called by the framework when it loads an ISA.
A pointer to the HSE_VERSION_INFO structure containing version information for the server and fields for the client to indicate version number, notifications, and priority desired. There is also a space for the filter application to register a small description of itself.
GetExtensionVersion gets the version number of the specification the DLL extension is based on. It also provides a short text description for server administrators.
GetExtensionVersion is one of two necessary entry points for an ISA. The second necessary entry point is the function HttpExtensionProc. Both of these are provided by MFC, with default implementation. Call the default implementation to set the version, and then override to replace the default text string with your own short description.