FTD2XX_NET.FTDI.SetEventNotification C# (CSharp) Method

        public FT_STATUS SetEventNotification(UInt32 eventmask, EventWaitHandle eventhandle)
        {
            // Initialise ftStatus to something other than FT_OK
            FT_STATUS ftStatus = FT_STATUS.FT_OTHER_ERROR;

            // If the DLL hasn't been loaded, just return here
            if (hFTD2XXDLL == IntPtr.Zero)
                return ftStatus;

            // Check for our required function pointers being set up
            if (pFT_SetEventNotification != IntPtr.Zero)
            {
                tFT_SetEventNotification FT_SetEventNotification = (tFT_SetEventNotification)Marshal.GetDelegateForFunctionPointer(pFT_SetEventNotification, typeof(tFT_SetEventNotification));

                if (ftHandle != IntPtr.Zero)
                {
                    // Call FT_SetSetEventNotification
                    ftStatus = FT_SetEventNotification(ftHandle, eventmask, eventhandle.SafeWaitHandle);
                }
            }
            else
            {
                if (pFT_SetEventNotification == IntPtr.Zero)
                {
                    LogB.Debug("FTD2XX: Failed to load function FT_SetEventNotification.");
                }
            }
            return ftStatus;
        }