#include <DrmUiHandling.h>
      #include <DrmHandleErrorObserver.h>

      using namespace DRM;

      // Call NewLC() to create an instance of CDrmUiHandling.
      CDrmUiHandling* drmUiHandler = CDrmUiHandling::NewLC();

      // Handling the error got when tried to read the file
      drmHandlerError = drmUiHandler->HandleErrorL( file, error, this );

      // delete the created instance of CDrmUiHandling
      CleanupStack::PopAndDestroy( drmUiHandler );

      ...

      // implement callbacks
      TEmbeddedPreviewAction CMyClass::EmbeddedPreviewAvailable( const TDesC& aUniqueId )
          {
          return EEmbeddedPreviewActionDefault;
          }

      TPreviewRightsAction CMyClass::PreviewRightsUrlAvailable( const TDesC& aPreviewRightsUrl )
          {
          return EPreviewRightsActionDefault;
          }

      TSilentRightsAction CMyClass::SilentRightsUrlAvailable( const TDesC& aSilentRightsUrl )
          {
          return ESilentRightsActionDefault;
          }

      void CMyClass::PreviewRightsAvailable()
          {
          // play the content, since preview rights were retrieved
          }

      void CMyClass::SilentRightsAvailable()
          {
          // play the content, since silent rights were retrieved
          }

      void CMyClass::PlayEmbeddedPreviewSelected( const TDesC& aUniqueId )
          {
          // play embedded preview part
          ...
          }

Since

S60 v5.0