[Pythonmac-SIG] Ctl.CreateRootControl( window ) always returns None

[Steven D. Majewski]

Actually, I can get something other than None as a return value.
If I call it twice on the same window I get an error on the second call:

	>>> w = Win.NewCWindow((50,50,480,220),'',0,1,-1,0,0)
	>>> Ctl.CreateRootControl(w)
	>>> Ctl.CreateRootControl(w)
	Traceback (innermost last):
	  File "<stdin>", line 1, in ?
	Mac OS Error: (-30587, 'Mac OS error code -30587')


But I can't find error code -30587 in the master list 
  <somewhere on apple developer web pages>ResultCodes.pdf
though maybe it's defined in an  include file somewhere. 


- Steve M.