Roopa,
I assume you are using windows based devices today and have already configured and implemented Work Manager 5.3 (not starting a new implementation). If that is the case then you can simply use the same client you have been using (the Win32 client) on that device.
If you are looking to start a new implementation you should be starting with Work Manager 6.1 which is based on SMP3 and uses the new WPF client.
--Bill