The following functions are used with communications devices.
| Function |
Description |
| BuildCommDCB |
Fills a specified DCB structure with values specified in a device-control string. |
| BuildCommDCBAndTimeouts |
Translates a device-definition string into appropriate device-control block codes and places them into a device control block. |
| ClearCommBreak |
Restores character transmission for a specified communications device and places the transmission line in a nonbreak state. |
| ClearCommError |
Retrieves information about a communications error and reports the current status of a communications device. |
| CommConfigDialog |
Displays a driver-supplied configuration dialog box. |
| EscapeCommFunction |
Directs a specified communications device to perform an extended function. |
| GetCommConfig |
Retrieves the current configuration of a communications device. |
| GetCommMask |
Retrieves the value of the event mask for a specified communications device. |
| GetCommModemStatus |
Retrieves modem control-register values. |
| GetCommProperties |
Retrieves information about the communications properties for a specified communications device. |
| GetCommState |
Retrieves the current control settings for a specified communications device. |
| GetCommTimeouts |
Retrieves the time-out parameters for all read and write operations on a specified communications device. |
| GetDefaultCommConfig |
Retrieves the default configuration for the specified communications device. |
| PurgeComm |
Discards all characters from the output or input buffer of a specified communications resource. |
| SetCommBreak |
Suspends character transmission for a specified communications device and places the transmission line in a break state. |
| SetCommConfig |
Sets the current configuration of a communications device. |
| SetCommMask |
Specifies a set of events to be monitored for a communications device. |
| SetCommState |
Configures a communications device according to the specifications in a device-control block. |
| SetCommTimeouts |
Sets the time-out parameters for all read and write operations on a specified communications device. |
| SetDefaultCommConfig |
Sets the default configuration for a communications device. |
| SetupComm |
Initializes the communications parameters for a specified communications device. |
| TransmitCommChar |
Transmits a specified character ahead of any pending data in the output buffer of the specified communications device. |
| WaitCommEvent |
Waits for an event to occur for a specified communications device. |