You can use iissync.exe, a command line utility, to replicate the metabase, and you can extend this replication functionality by developing custom replication extensions. In addition to replicating the metabase, iissync.exe uses installed system replication extension interfaces to replicate Web application definitions and Microsoft® Transaction Server (MTS) application packages. Iissync.exe replicates data stored in a secure manner as well as non-secure data. You can develop one or more custom replication extension interfaces to use iissync.exe to extend the replication process for your needs. The topics in this section specify the requirements for your interfaces. See Custom Extensions Interface for details on registering your interfaces, and Replication and Clustering in IIS for details about iissync.exe.
You can find admex.h and other relevant header files in the \inetpub\iissamples\sdk\include directory.