Hello All, I have opened a serial port using the normal syntax, OPEN "C",_modemPort,9600,_noParity,_oneStopBit,_eightBits,4800 From reading IM, Serial Driver, I think that somewere during opening the port SerSetBuf is been called, so I'm pretty sure that somewere there is a variable / constant holding the handle to the buffer. Question, does anyone know how I can get the handle to the serial port buffer ? Before you ask I want to be able to block move incoming raw ASCII data into a second rather large buffer of my own, about 300K. Kind regards, Sean.