Reporting on all Features on a Device Dynamically Using RFeatureControl

How to list all supported features on a device using RFeatureControl dynamically.

1. 
   Create an instance of RFeatureControl,

   
   // replace <featureUID> with a real Uid ) 
   #include <featurecontrol.h>
   #include <featureinfo.h> // for feature definitions
   CMyClass::MyMethodL()
        {
        // Replace KFeatureUidx with real feature Uid.
        // Open() must be called before calling any other methods. 
        // Disconnect is done by calling the Close() method.
        RFeatureControl featureControl;
   

2. 
   call its Open() function,

   
        TInt err = featureControl.Open();
   

3. 
   create an instance of RFeatureArray (an array of TFeatureEntry objects),

   
            // List all supported features.
   
            // A client owned RFeatureUidArray array which will be filled with 
            // the UIDs of supported features. 
            RFeatureUidArray supportedFeatures;
   
   

4. 
   call its ListSupportedFeatures() function with a reference to the RFeatureArray as argument,

   
            // ListSupportedFeatures() returns one of the Symbian error codes.
            err = featureControl.ListSupportedFeatures( supportedFeatures );
   
            // do something
   
   

5. 
   call its Close() function,

   
            // Closes the array and frees all memory allocated to the array.
            supportedFeatures.Close();
   

6. 
   call the Close() function of the RFeatureArray object.

   
            // Remember to call CloseL after using RFeatureControl.
            // It disconnects the Feature Manager server.
            featureControl.Close();  
            }
   
        }