Querying a Single Feature Dynamically Using RFeatureControl

How to query a feature 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 Uid of the feature you wish to query,
4. 
   call the FeatureSupported() function of the RFeatureControl object with the Uid of the feature as argument, and

   
        if ( err == KErrNone )
            {
            // Query single feature status
             err = control.FeatureSupported( KFeatureUid3 );
             if( err == KFeatureSupported )
                 {
                 // do something with enabled feature
                 }
   
   

5. 
   call the Close() function of the RFeatureControl object.

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