Operation

The IOCTL_SERIAL_CONFIG_SIZE request returns information about configuration size.

Serial always returns zero.

This request is obsolete and should not be used by new drivers for Microsoft Windows 2000 and later.

Input

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

Output

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

I/O 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

Headers: Defined in ntddser.h. Include ntddser.h.