public static Guid GetActive()
{
IntPtr pCurrentSchemeGuid = IntPtr.Zero;
PowrProf.PowerGetActiveScheme(IntPtr.Zero, ref pCurrentSchemeGuid);
var currentSchemeGuid = (Guid)Marshal.PtrToStructure(pCurrentSchemeGuid, typeof(Guid));
return(currentSchemeGuid);
}
public static IEnumerable <Guid> FindAll()
{
var schemeGuid = Guid.Empty;
uint sizeSchemeGuid = (uint)Marshal.SizeOf(typeof(Guid));
uint schemeIndex = 0;
while (PowrProf.PowerEnumerate(IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)PowrProf.AccessFlags.ACCESS_SCHEME, schemeIndex, ref schemeGuid, ref sizeSchemeGuid) == 0)
{
yield return(schemeGuid);
schemeIndex++;
}
}
public static string ReadFriendlyName(Guid schemeGuid)
{
uint sizeName = 1024;
IntPtr pSizeName = Marshal.AllocHGlobal((int)sizeName);
string friendlyName;
try
{
PowrProf.PowerReadFriendlyName(IntPtr.Zero, ref schemeGuid, IntPtr.Zero, IntPtr.Zero, pSizeName, ref sizeName);
friendlyName = Marshal.PtrToStringUni(pSizeName);
}
finally
{
Marshal.FreeHGlobal(pSizeName);
}
return(friendlyName);
}
public static void SetActive(Guid powerSchemeId)
{
var schemeGuid = powerSchemeId;
PowrProf.PowerSetActiveScheme(IntPtr.Zero, ref schemeGuid);
}