## Physical Device Driver Reference

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### POWER_GETPOWERINFO (62h) - Remarks

On input, the ParmLength field indicates the size of the Parameter Packet in bytes. On output, the ParmLength field indicates the minimum required size (in bytes) for the function.

If the APM Subsystem is not connected to APM BIOS, this command will fail with a ReturnCode value of PowerDisabled. However, it is not required that APM be Enabled or Engaged to issue this command.