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Hello. I've been finding the way to determine whether
the process is running as service or not. Does this way
work? On my environment, True is returned. I hope False
will be returned in service environment.
http://msdn.microsoft.com/en-us/library/d56de412%28v=VS.80%29.aspx
http://msdn.microsoft.com/en-us/library/ms683225%28VS.85%29.aspx
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from __future__ import print_function
import ctypes
from ctypes.wintypes import *
UOI_FLAGS = 1
WSF_VISIBLE = 0x0001
class USEROBJECTFLAGS(ctypes.Structure):
 _fields_ = [("fInherit", BOOL),
 ("fReserved", BOOL),
 ("dwFlags", DWORD)]
def window_station_has_display_surfaces():
 dll = ctypes.windll.user32
 h = dll.GetProcessWindowStation()
 if not h:
 raise ctypes.WinError()
 uof = USEROBJECTFLAGS()
 needed = DWORD()
 res = dll.GetUserObjectInformationW(h,
 UOI_FLAGS, 
 ctypes.byref(uof),
 ctypes.sizeof(uof),
 ctypes.byref(needed))
 if not res:
 raise ctypes.WinError()
 return bool(uof.dwFlags & WSF_VISIBLE)
def main():
 print(window_station_has_display_surfaces())
if __name__ == '__main__':
 main()