batch Question

Hey guys, gots a question for ya. How can I call something in a batch file, wait till it terminates, then execute another command? I've been trying to patch together bits and peices that I've found on the forums, but I think I screwed up something in the syntax, so I scrapped the whole thing. (For me, the 'help' in the command prompt was a little obscure...) I've been trying to make a batch that will call PortableOO.o, then delete the OO.o directory in %APPDATA% when it terminates, playing around with 'RD', 'DEL', '/WAIT' (?), and whatnot. Any suggestions?