Not able to turn on/off bluetooth radio setting using Win32 API (Bluetoothapis.h)

Question

I need to turn ON/OFF the Bluetooth radio in Windows 10 settings. I tried the Win32 API - Bluetoothapis.h API in which,

BluetoothGetRadioInfo function => Returns my bluetooth radio name and I could not find any set method there.

BluetoothSetServiceState function => Returns ERROR_SERVICE_DOES_NOT_EXIST error, I am not able to find the particular bluetooth GUID.

I tried both these functions in native C++ & also in C# and I need certain clarifications,

1. Is there any specific API to change the bluetooth radio settings?
2. In Bluetoothapis.h API is there any Set method to change the bluetooth radio?
3. How do I find the Bluetooth service GUID?

https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/

https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothgetradioinfo

https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothsetservicestate

Answer 1

It can be done with Radio class, like in the code posted in this thread
Capabilities are not needed in a Desktop app

You must :

Add reference to C:\Program Files (x86)\Windows Kits\10\UnionMetadata\Windows.winmd
Add reference to C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETCore\v4.5\System.Runtime.WindowsRuntime.dll

and compile as x64 if the OS is x64
(tested on Windows 10 21H1 64-bit)