C# Signature:

[DllImport("Kernel32.dll", SetLastError=true)]
static extern IntPtr OpenEvent(uint dwDesiredAccess, bool bInheritHandle, string lpName);

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Tip 1: Use OpenEvent to open named event and attach it to AutoResetEvent class:

  AutoResetEvent are= new AutoResetEvent(false);
  are.Close();
  GC.ReRegisterForFinalize(are);
  are.Handle= handle; // handle from OpenEvent

Sample Code:

  // taken from header files
  const uint STANDARD_RIGHTS_REQUIRED    = 0x000F0000;
  const uint SYNCHRONIZE             = 0x00100000;
  const uint EVENT_ALL_ACCESS        = (STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|0x3);
  const uint EVENT_MODIFY_STATE        = 0x0002 ;
  const long ERROR_FILE_NOT_FOUND        = 2L;

  // open event with error handling
  IntPtr handle= OpenEvent(EVENT_ALL_ACCESS | EVENT_MODIFY_STATE, false, name);
  int le= Marshal.GetLastWin32Error();
  if ((handle==IntPtr.Zero) && (le!=0) && (le!=ERROR_FILE_NOT_FOUND))
    throw new ApplicationException(string.Format("Error in pinvoked CreateEvent: {0}", le));

Alternative Managed API:

CreateEvent also opens an existing (named) event...

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