IOCTL_POWER_CAPABILITIES

  • 项目

This IOCTL queries to determine device-specific capabilities.

Parameters

  • pBufIn
    [in] Set to a pointer to POWER_RELATIONSHIP. This defines the target device for parent and bus drivers. Otherwise, set to NULL.
  • dwLenIn
    [in] Size of the POWER_RELATIONSHIP structure.
  • pBufOut
    [out] Set to a pointer to POWER_CAPABILITIES. This defines the devices power capabilities.
  • dwLenOut
    [out] Size of the POWER_CAPABILITIES structure.
  • pdwActualOut
    [out] Number of bytes passed back in the pBufOut buffer.

Return Values

TRUE if successful, FALSE otherwise.

Remarks

If a driver fails this IOCTL, the Power Manager assumes the target driver does not handle the remaining IOCTLs and will not send them. As a minimum, the driver should complete the DeviceDx in POWER_CAPABILITIES.

All drivers that support the Power Manager interface must handle this IOCTL.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Pm.h.

See Also

POWER_CAPABILITIES | POWER_RELATIONSHIP

 Last updated on Tuesday, May 18, 2004

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