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The following table shows the device information IOCTLs.
| Programming element | Description |
|---|---|
| IOCTL_HAL_GET_DEVICE_INFO | This IOCTL describes the system parameters information (SPI) codes supported by the SystemParametersInfo function. |
| IOCTL_HAL_GET_DEVICEID | This IOCTL returns the current DEVICE_ID structure assigned to the device. |
| IOCTL_HAL_GET_HWENTROPY | This IOCTL retrieves a 64-bit random number based upon an OEM-defined device hardware identifier. |
| IOCTL_HAL_GET_UUID | This IOCTL returns the universally unique identifier (UUID). |
| IOCTL_HAL_QUERY_DEVICE_SETTINGS | This IOCTL obtains information about the system parameters information (SPI) codes supported by the SystemParametersInfo function. |
| IOCTL_HAL_QUERY_DISPLAYSETTINGS | This IOCTL queries the kernel for information about a preferred resolution for the system to use. It is used by the graphics device interface (GDI). |
| IOCTL_HAL_SET_DEVICE_INFO | This IOCTL sets the data returned by IOCTL_HAL_GET_DEVICE_INFO. |
| IOCTL_PROCESSOR_INFORMATION | This IOCTL retrieves microprocessor information from the OAL and stores it in the PROCESSOR_INFO structure. It is a request by an application. |
See Also
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