C# Signature:

[DllImport("advapi32.dll", SetLastError=true)]
static extern extern int SetPowerRequirement(string DeviceName, DevicePowerState State, uint dwDeviceFlags, string Name, ulong Reserved);

VB Signature:

Declare Function SetPowerRequirement Lib "advapi32.dll" (TODO) As TODO

User-Defined Types:

public enum DevicePowerState : int

    {

        Unspecified = -1,
        D0 = 0, // Full On: full power, full functionality
        D1, // Low Power On: fully functional at low power/performance
        D2, // Standby: partially powered with automatic wake
        D3, // Sleep: partially powered with device initiated wake
        D4, // Off: unpowered
     }

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

public static void setBackLightOn()

{

    try
    {
        unsafe
        {  
          SetPowerRequirement("BKL1:",DevicePowerState.D0,POWER_NAME,null,0);
        }
    }
    catch ( Exception ex )
    {
        String str = ex.Message;
    }

}

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).