Creating System-wide Property Policy Plug-in

System-wide Properties (SwP) are attributes of a device that have system-wide significance (for example, the power status or device lock status). The value of any System-wide property is normally independent of the System State, but the state and different properties can be combined with policy to generate a new status indications and actions.

1. 
   Define a class from MSsmSwpPolicy interface.
2. 
   Export the static method to create new system-wide property policy plug-in as shown in the code snippet:

   
   EXPORT_C MSsmSwpPolicy* CSimStatuspolicy::NewL()
   {
       CSimStatuspolicy* self = new (ELeave) CSimStatuspolicy;
       CleanupStack::PushL(self);
          self->ConstructL();
       CleanupStack::Pop(self);
       return self;
   }
   

   The code returns a new plug-in object for system-wide property plug-in.