The OnLineControl event occurs when other application changes line control parameters of the sniffed serial port.

OnLineControl(
 BYTE StopBits,// Stop Bits
 BYTE Parity,// Parity
 BYTE WordLength// Data Bits
);


Parameters 

StopBits     

[in] Number of stop bits to be used. This variable can be one of the following values:

ValueMeaning
01 stop bit
11.5 stop bits
22 stop bits

Parity 

[in] Parity scheme to be used. This variable can be one of the following values:

ValueMeaning
0No parity
1Odd
2Even
3Mark
4Space

WordLength 

[out] Number of bits in the bytes transmitted and received.