Use the API call to SetWindowPos. It will locate and size a window, and change its zorder.

nomainwin
open "Hi" for window as #1
#1 "trapclose [quit]"
h=hwnd(#1)
x=10
y=50
width=500
height=100

calldll #user32, "SetWindowPos",_
h as ulong,_              'window handle
_HWND_TOP as ulong,_      'position flag
x as long,_               'new left x coord
y as long,_               'new top y coord
width as long,_           'new window width
height as long,_          'new window height
_SWP_SHOWWINDOW as long,_ 'SetWindowPos show flag
re as boolean

wait

[quit]close#1:end