haiku error messages, 418-420 
     hardware, and application failure, 5 
      health monitoring 
  IIS 5.x and, 279 
  IIS 6.0 and, 280 
     HeartbeatMonitor, 474-481 
  debugging, 477-481 
  heartbeats, defined, 474 
  installing, 475-477 
  introducing, 474-475 
      HelpLink System.Exception property, 371 
      Hide the Furniture bug, 180 
     hit count modifier, 103-104 
     HKEY_LOCAL_MACHINE (HKLM) 
  JIT debugger and 
  managed code settings, 91-92 
  unmanaged code settings, 92-93 
  unhandled exception filter considerations and, 406 
     How Good Are You?, 483-484 
     HResult System.Exception property, 371 
     HTTP POST transmission, vs. SOAP, 247 
     human error, and application failure, 5