How can I turn ON radio of a Wifi adapter that is actually OFF?

Question

I'm using Managed Wifi to get the radio state of my Wifi adapter. How can I turn the radio ON in case it is actually off ?

Something like this :

WlanClient wlanClient = new WlanClient()
var targetInterface = wlanClient.Interfaces.FirstOrDefault()
if (targetInterface != null)
{
    bool radioIsOff = targetInterface .RadioState.PhyRadioState[0].dot11SoftwareRadioState == Wlan.Dot11RadioState.Off;
    if (radioIsOff)
    {
       // TODO
    }
}

Answer 1

I just added this to the WlanInterface class of the Managed Wifi API :

        IntPtr radioStatePtr = new IntPtr(0L);
        try
        {
            Wlan.WlanPhyRadioState radioState = new Wlan.WlanPhyRadioState();
            radioState.dwPhyIndex = 0; // TODO : can change ???
            radioState.dot11HardwareRadioState = Wlan.Dot11RadioState.On; // ignored in fact, according to http://msdn.microsoft.com/en-us/library/windows/desktop/ms706791(v=vs.85).aspx 
            radioState.dot11SoftwareRadioState = Wlan.Dot11RadioState.On;

            radioStatePtr = Marshal.AllocHGlobal(Marshal.SizeOf(radioState));
            Marshal.StructureToPtr(radioState, radioStatePtr, false);

            Wlan.ThrowIfError(
                Wlan.WlanSetInterface(
                            client.clientHandle,
                            info.interfaceGuid,
                            Wlan.WlanIntfOpcode.RadioState,
                            (uint)Marshal.SizeOf(typeof(Wlan.WlanPhyRadioState)),
                            radioStatePtr,
                            IntPtr.Zero));
        }
        finally
        {
            if (radioStatePtr.ToInt64() != 0)
                Marshal.FreeHGlobal(radioStatePtr);
        }

Tested on Win 7.