This doesn't contain the MSComm control. Instead it is a UserControl you might use in your MSComm-based programs as a "breakout box" for viewing the status of the pins supported by the MSComm control.
In a real program you'd wire up the MSComm control's events and properties to the events and properties of an instance of the RS232 control.
The RS232 control is attached here as part of a demo Project that just uses push buttons to control the state of the pins.