internal static extern Win32Error EventRegister( ref Guid ProviderId, EventEnableCallback EnableCallback, IntPtr CallbackContext, out SafeEventRegHandle RegHandle );
internal static extern Win32Error EventWrite( SafeEventRegHandle RegHandle, ref EVENT_DESCRIPTOR EventDescriptor, int UserDataCount, EVENT_DATA_DESCRIPTOR[] UserData );
internal EventTrace(SafeEventRegHandle handle) { _handle = handle; }