cCall [pPortClose], hPort or eax, eax jz error_handler
Called by the _VCOMM_CloseComm service to close a port. Uses the C calling convention.
hPort
Address of a _PORTINFORMATION structure returned by the PortOpen function.
If the PortOpen function calls the _VCOMM_Acquire_Port service, the PortClose function must call the _VCOMM_Release_Port service.
See also _PORTINFORMATION, PortOpen, _VCOMM_CloseComm