Device Information IOCTLs (Compact 2013)

10/16/2014

The following table shows the device information I/O control codes (IOCTLs).

Programming element	Description
IOCTL_HAL_GET_DEVICE_INFO	Returns device information using the system parameters information (SPI) codes supported by the SystemParametersInfo function.
IOCTL_HAL_GET_DEVICEID (deprecated)	Obsolete starting with Windows Embedded Compact 2013. Returns the current DEVICE_ID structure assigned to the device. Its functionality has been integrated into IOCTL_HAL_GET_DEVICE_INFO.
IOCTL_HAL_GET_HWENTROPY	Retrieves a 64-bit random number based upon an OEM-defined device hardware identifier.
IOCTL_HAL_GET_UUID	Returns the universally unique identifier (UUID). Obsolete starting with Windows Embedded Compact 2013. Its functionality has been integrated into IOCTL_HAL_GET_DEVICE_INFO.
IOCTL_HAL_QUERY_DEVICE_SETTINGS	Obsolete. Obtains information about the system parameters information (SPI) codes supported by the SystemParametersInfo function.
IOCTL_HAL_QUERY_DISPLAYSETTINGS	Queries the kernel for information about a preferred resolution for the system to use. It is used by the graphics device interface (GDI).
IOCTL_PROCESSOR_INFORMATION	Retrieves microprocessor information from the OAL and stores it in the PROCESSOR_INFO structure. It is a request by an application.

See Also