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The following table shows the Power Management IOCTLs with a description of the purpose of each.
| Programming element | Description |
|---|---|
| IOCTL_POWER_CAPABILITIES | This IOCTL queries to determine device-specific capabilities. |
| IOCTL_POWER_GET | This IOCTL gets the current device power state. |
| IOCTL_POWER_QUERY | This IOCTL queries to determine whether changing power state is feasible. This IOCTL has been deprecated and is not called by the Power Manager. |
| IOCTL_POWER_SET | This IOCTL requests a change from one device power state to another. |
| IOCTL_REGISTER_POWER_RELATIONSHIP | This IOCTL notifies the parent device so the parent device can register all devices it controls. |
See Also
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