RThreshold Sets or Retrieves the number of bytes that arrive in the transmit buffer before an OnComm event is raised. MSComm32 and SComm32 have the same syntax and functionality. Syntax:- SComm1.RThreshold = value   value:- A numerical expression indicating the RThreshold number of bytes.   Examples:- SComm1.RThreshold = 0 '// OnComm events will not be triggered. SComm1.RThreshold = 1 '// OnComm events will be triggered when one or more characters arrives in the transmit buffer. Remarks This can be any value from 0 to 32767 but it is recommended that you only use 0 or 1 as in the above examples.