Well, do you want to dicern between network shares and actual partitions? What Windows version? 9x or NT/2K/XP?
If it is the later (NT/2K/XP) look into parsing the output of net share (provided you have admin rights on the local machine). This still won't get you floppy drives or removable devices but it's a start.

You have not provided very much info so I'm not exactly sure what you want. Oh, and why can't you use adminmisc?

"Nothing is sure but death and taxes" I say combine the two and its death to all taxes!