http://www.commandline.co.uk/cmdow/index.html
Download
Cmdow is a Win32 commandline utility for NT4/2000/XP/2003 that allows windows to be listed, moved, resized, renamed, hidden/unhidden, disabled/enabled, minimized, maximized, restored, activated/inactivated, closed, killed and more.
eg.
Run a program hidden: cmdow /run /hid myprog.exe