After much testing I think I can say that the mscomm oncomm event doesn't always fire when it is supposed to. I am
implementing a nonstandard handshaking method. The control is a receiver. I have handshaking is turned off. RTS threshold is
set to zero. I require 4800,e,7,2. Mscomm should wait for CTS to change to fire. Mscomm should sit and wait till string
'q+chr(4)' is sent to it. As soon as the sender does that it should ping it's RTS line which it does and the receiver watches
for CTS to change. Then the receiver sends it's ACK. MScomm never sees this CTS change half the time. I can't figure out
why except that mscomm is not written well enough to handle this handshake method. Is there a better control somewhere
that I can use?