Problem with calling function from dll

I have problem with using function from dll. import ctypes b = ctypes.windll.LoadLibrary("kernel32") a = "" b.GetComputerNameA(a,20) But I got exception: Traceback (most recent call last): File "", line 1, in b.GetComputerNameA(a,20) WindowsError: exception: access violation reading 0

Re: Problem with calling function from dll

sb = ctypes.create_string_buffer(20) i = ctypes.byref(ctypes.c_int(20)) w = b.GetComputerNameA(sb,i) w -> 1 sb.value -> nazwa komputera :-) -- http://mail.python.org/mailman/listinfo/python-list