The SupportsSpecialCharacters property indicates whether serial port control characters are supported. These characters signal ...

The SupportsSpecialCharacters property indicates whether serial port control characters are supported. These characters signal events rather than data. These characters are not displayable and are set by the driver. They include EofChar, ErrorChar, BreakChar, EventChar, XonChar, and XoffChar.
Values: TRUE or FALSE. A value of TRUE indicates special characters are supported.