tfs : Undo Pending changes

How many file are checkout on tfs

tf status $/MyProject/SomeFolder/*.* /user:* /recursive

http://stackoverflow.com/questions/18344852/how-can-i-find-out-all-of-the-checked-out-files-in-tfs-2010

undo /workspace:terminalname;usrName  $/path/*.* /recursive /s:http://serverIP:8080/tfs