HKLM\SYSTEM\CurrentControlSet\Services\SNMP\Parameters\
The ExtensionAgents subkey contains entries that indicate where in the registry the configuration data for SNMP extension agents is stored.
The names of the entries consist of decimal integers beginning with 0. The value of the entry is the registry path to the data that is loaded by the DLL for the extension agent. All entries in this subkey have the REG_SZ data type.
For example,
| 0 | REG_SZ | Software\Microsoft\W3SVC\CurrentVersion |
In this example, the configuration data for the WWW service is located in HKEY_LOCAL_MACHINE\Software\Microsoft\W3SVC\CurrentVersion.