| OnBreak | This event is triggered when a break signal is detected in the received input. |
| OnCts | This event is triggered when a change of the CTS signal is detected. |
| OnDcd | This event is triggered when a change of the DCD signal is detected. |
| OnDsr | This event is triggered when a change of the DSR signal is detected. |
| OnError | This event is triggered when a line-status error occurs. |
| OnEventChar | This event is triggered when the event character was received and placed in the input buffer. The event character is specified in EventChar property. |
| OnPortLost | This event is triggered when a COM port is removed while it is opened (e.g. using USB to Serial cable). |
| OnReceive | This event occurs when data is received on the serial port. |
| OnRing | This event is triggered when a change of the RING signal is detected. |
| OnTransmit | This event is triggered when data has been sucessfully written to the serial port. |