Auto detect Drives

Question

how to get all drives in a PC. and types of every drive and free-space of each


i.e. System-Drive, CD-Drive, DVD-Drive, Removable, ... etc.


If a system is attached with a new drive may be a pen drive or external hard disc.How to detect them at time of attachment ?


And i wanna to show them like gadget in win xp as we see them in the win 7 with the right click option to eject the removeable media And also i wanna to apply skin option with it.......Plz give me the solution 
Thanks