Thomas Heller schrieb:
> "g.franzkowiak" <[EMAIL PROTECTED]> writes:
>
>
>>Hello everybody,
>>
>>I've tryed to use an interprocess communication via
>>SendMessage on Windows.
>>Unfortunately, nothing goes on
>>
>>#########################################################################
>>#! /usr/bin/env python
>>
>>import win32api, win32ui, win32con
>>import struct, array
>>
>>"""
>>typedef struct tagCOPYDATASTRUCT { // cds
>> DWORD dwData;
>> DWORD cbData;
>> PVOID lpData;
>>} COPYDATASTRUCT;
>>"""
>>
>>def packCopyData(nNum, sString):
>> int_buffer = array.array("L",[nNum])
>> char_buffer = array.array('c', sString)
>> int_buffer_address = int_buffer.buffer_info()[0]
>> char_buffer_address = char_buffer.buffer_info()[0]
>> char_buffer_size = char_buffer.buffer_info()[1]
>> copy_struct = struct.pack("pLp", # dword*, dword, char*
>> int_buffer_address,
>> char_buffer_size,
>> char_buffer)
>> return copy_struct
>
>
> After packCopyData(...) returns, the arrays are destroyed, which will
> probably void their contents. You must keep them alive until you don't
> need the COPYDATASTRUCT instance any longer. For this kind of stuff,
> ctypes may be easier to use than pywin32.
>
> Thomas
Hmm, have read something in <<http://aspn.activestate.com>>
and the script changed to this:
#---------------------------------------------------------
#! /usr/bin/env python
import win32api, win32ui, win32con, win32gui
import struct, array
from ctypes import *
"""
typedef struct tagCOPYDATASTRUCT { // cds
DWORD dwData;
DWORD cbData;
PVOID lpData;
} COPYDATASTRUCT;
"""
class COPYDATATYPE(Structure):
_fields_ = [("nNum", c_ulong),
("szData", c_char_p)]
class COPYDATASTRUCT(Structure):
_fields_ = [("dwData", c_ulong),
("cbData", c_ulong),
("lpData", POINTER(COPYDATATYPE))]
# get the window handle
hwnd = win32ui.FindWindow(None, "target window")
# print just for fun
# ##print hwnd
# prepare copydata structure for sending data
cpyData = COPYDATATYPE(1, '1')
cds = COPYDATASTRUCT(c_ulong(1),
c_ulong(sizeof(cpyData)),
pointer(cpyData))
# try to send a message
win32api.SendMessage(hwnd,
win32con.WM_COPYDATA,
0,
pointer(cds))
#---------------------------------------------------------
and the message for the last line is:
==> TypeError: an integer is required"
This message comes with "pointer(cds)" and with "addressof(cds)"
gerd
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