Log parser is a powerful, versatile tool that provides universal query access to text-based data such as log files, XML files and CSV files, as well as key data sources on the Windows® operating system such as the Event Log, the Registry, the file system, and Active Directory®.
Download LogParser 2.2 from Microsoft.
Get help with LogParser in the LogParser Forums.
More on LogParser
Log Parser sucks unless you know SQL query code.