IOCTL_SERIAL_GET_CHARS IOCTL

Description

The IOCTL_SERIAL_GET_CHARS request retrieves the special characters that the serial controller driver uses with handshake flow control. The special characters are described by a SERIAL_CHARS structure.

To set special characters, a client can use an IOCTL_SERIAL_SET_CHARS request.

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

The AssociatedIrp.SystemBuffer member points to a client-allocated SERIAL_CHARS structure that the serial controller driver uses to output the special characters.

Output buffer length

The Parameters.DeviceIoControl.OutputBufferLength member is set to the size in bytes of a SERIAL_CHARS structure.

Input/output buffer

Input/output buffer length

Status block

If the request is successful, the Information member is set to the size in bytes of SERIAL_CHARS. Otherwise, the Information member is set to zero.

The Status member is set to one of the Generic Status Values for Serial Device Control Requests.

See also

IOCTL_SERIAL_SET_CHARS

SERIAL_CHARS