How do you delete a log from the Event Viewer?

I have been experimenting with a bunch of Window Services. Consequently, I have a whole bunch of useless logs in the Event Viewer.

These logs were instantiated using code like:

Code:

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                        Diagnostics::EventLog^ log ;
                        if (! Diagnostics::EventLog::SourceExists(L"MySvc4Service") )
                        {
                                Diagnostics::EventLog::CreateEventSource(L"MySvc4Service", "MySvc4Log");
                        }
                        log = ( gcnew Diagnostics::EventLog(L"MySvc4Log") );
                        log->Source = L"MySvc4Service";

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The Event Viewer has menu options for clearing the entries, cloning, saving, and deleting the cloned logs. But I cannot figure out how to clean up the Event Viewer and get rid of the useless old log files.