C# Signature:

    [DllImport("powrprof.dll")]
    public static extern UInt32 PowerGetActiveScheme(IntPtr UserRootPowerKey, ref IntPtr ActivePolicyGuid);

VB Signature:

    Declare Function PowerGetActiveScheme Lib "powrprof.dll" (TODO) As Integer

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

    private string GetCurrentPowerSchemeVistaAPI()
    {
        IntPtr ptrActiveGuid = IntPtr.Zero;
        uint res = PowerGetActiveScheme(IntPtr.Zero, ref ptrActiveGuid);
        if (res == 0)
        {
        uint buffSize = 0;
        res = PowerReadFriendlyName(IntPtr.Zero, ptrActiveGuid, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, ref buffSize);
        if (res == 0)
        {
            IntPtr ptrName = Marshal.AllocHGlobal((int)buffSize);
            res = PowerReadFriendlyName(IntPtr.Zero, ptrActiveGuid, IntPtr.Zero, IntPtr.Zero, ptrName, ref buffSize);
            if (res == 0)
            {
            string ret = Marshal.PtrToStringUni(ptrName);
            Marshal.FreeHGlobal(ptrName);
            return ret;
            }
            Marshal.FreeHGlobal(ptrName);
        }
        }
        throw new Exception("Error reading current power scheme. Native Win32 error code = " + res);
    }

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).