Closes the Bluetooth Manager and releases all allocated resources.
function Close: Integer;
If the function succeed the return value is WCL_E_SUCCESS. Otherwise the method returns one of the WCL error codes.
After calling this method an application should not use any of the Bluetooth Framework features. All instances of the TwclBluetoothRadio class are not valid after calling this method.
An application must call this method from its main thread only.
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