IOCTL_SERIAL_GET_HANDFLOW IOCTL (ntddser.h)
The IOCTL_SERIAL_GET_HANDFLOW request returns information about the configuration of the handshake flow control set for a serial device.
To set the configuration of the handshake flow control, a client can use an IOCTL_SERIAL_SET_HANDFLOW request.
For more information about the settings for handshake flow control, see SERIAL_HANDFLOW.
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The AssociatedIrp.SystemBuffer member points to a client-allocated SERIAL_HANDFLOW structure that the serial controller driver uses to output information about the configuration of handshake flow control.
Output buffer length
The Parameters.DeviceIoControl.OutputBufferLength member is set to the size, in bytes, of a SERIAL_HANDFLOW structure.
Status block
If the request is successful, the Information member is set to the size, in bytes, of a SERIAL_HANDFLOW structure. 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.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddser.h (include Ntddser.h) |