PortTransmitChar

cCall [pPortTransmitChar], <hPort, ch>
or      eax, eax
jz      error_handler

Called by the _VCOMM_TransmitCommChar service to send an "immediate" character to a port. The port driver must transmit the specified character before any characters in the transmit queue. Uses the C calling convention. Must be callable at interrupt time.

• Returns TRUE if successful, FALSE otherwise.

hPort

Address of a _PORTINFORMATION structure returned by the PortOpen function.

ch

Character to transmit.

See also _PORTINFORMATION, PortOpen, _VCOMM_TransmitCommChar