Reporting on Several Features Dynamically Using RFeatureControl

How to query a feature set 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. 
   determine the features you want a report on,
4. 
   create an instance of RFeatureArray (an array of TFeatureEntry objects),

   
        if ( err == KErrNone )
            {
            // Query multiple features statuses (single IPC-call, so less overhead)
             RFeatureArray Uids;
             CleanupClosePushL(Uids);
   

5. 
   append the Uid of each feature entry to the array,

   
             Uids.AppendL( KFeatureUid1 );
             Uids.AppendL( KFeatureUid2 );
   

6. 
   call the FeaturesSupported() function of the RFeatureControl object with a reference to the feature array as argument, and

   
            TInt err = control.FeaturesSupported( Uids );
   

7. 
   call the Close() function of the RFeatureControl object.

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