private void SetPowerPlanButton_Click(object sender, EventArgs e)
        {
            Guid powerPlanGUID = new Guid(GUID_BALANCED);

            switch (powerPlanComboBox.SelectedItem)
            {
            case NAME_ULTIMATE_PERFORMANCE:
                if (ultimatePerformanceGUIDIndex == 2)
                {
                    powerPlanGUID = new Guid(GUID_ULTIMATE_PERFORMANCE_2);
                }
                else
                {
                    powerPlanGUID = new Guid(GUID_ULTIMATE_PERFORMANCE);
                }
                break;

            case NAME_MAX_PERFORMANCE:
                powerPlanGUID = new Guid(GUID_MAX_PERFORMANCE);
                break;

            case NAME_BALANCED:
                powerPlanGUID = new Guid(GUID_BALANCED);
                break;

            case NAME_POWER_SAVER:
                powerPlanGUID = new Guid(GUID_POWER_SAVER);
                break;
            }

            WinApiCalls.PowerSetActiveScheme(IntPtr.Zero, ref powerPlanGUID);

            setPowerPlanButton.Enabled = false;
        }