IOCTL_SERIAL_CONFIG_SIZE IOCTL

The IOCTL_SERIAL_CONFIG_SIZE request returns information about configuration size.

Serial.sys always returns a configuration size of zero.

This request is obsolete and should not be used by new drivers for Microsoft Windows 2000 and later.

Major Code

IRP_MJ_DEVICE_CONTROL

Input Buffer

None.

Input Buffer Length

None.

Output Buffer

The AssociatedIrp.SystemBuffer member points to a client-allocated ULONG buffer that Serial.sys uses to output configuration size information.

Output Buffer Length

The Parameters.DeviceIoControl.OutputBufferLength is set to the size in bytes of a ULONG.

Input / Output Buffer

Input / Output Buffer Length

Status Block

The Information member is set to the size in bytes of a ULONG.

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

Requirements

   
Header ntddser.h (include Ntddser.h)