SerialPort.DataReceived "Problem"

[Tony Kwong]

I am using my mobile phone as modem to send some SMS using modem AT commands
and have the SerialPort.DataReceived to get the "reply" from the Port using
"m_SerialPort.ReadExisting();"
private void SerialPort_DataReceived(object sender,
SerialDataReceivedEventArgs e)
{
m_WaitForAnswer.Stop();
m_ReceivedAnswer = true;
m_ReceivedText = m_SerialPort.ReadExisting();
}

However, I sometimes cannot get the expected "reply" from it... the value of
m_ReceivedText may become partial of the expected result and sometimes even
as part of the command that I was sending.

Is there any way that I can get the "full reply" and/ or to distinguish
whether the port is "sending" or "receiving"?

Thanks~
Tony