title: How to write Windows Event log records with non-existing source
body: <p>Somebody gave me a testing program to write records into the windows event log (but I don't have the sources). I understand the general way of writing and reviewing event log, but that program behaves very special in a way that I can write records, that have a source which does not exist.
  There is not even a registry entry in .../eventlog/application, hence no formatting libs.</p>
  
  <p>If I try that from my own code, I can write such a record but the Windows Event Viewer then always tells me something about "description cannot be found" (which is correct and I understand why that happens).</p>
  
  <p>The question is now: Since that foreign test prog CAN do it, it must be possible somehow - but HOW?</p>
  
  <p>Many thx!! :-)</p>