>>194
それは CustomLog というらしい。

ttp://msdn.microsoft.com/library/default.asp?url=/library/en-us/debug/base/eventlog_key.asp

CustomLog

Contains events logged by applications that create a custom log.
Using a custom log enables an application to control the size of the log
or attach SACLs for security purposes without affecting other applications.

Windows NT: Custom logs are not supported.