struct module usage

[BW Glitch]

Hi!

I'm trying to send a message from a Python script to a Scite window via
win32gui.SendMe ssage() I'm trying to pack the commands using the struct
module. However, I can't figure out why Scite isn't responding as I
expect. The SendMessage is returning 0.

I've searched Google and haven't found anything that would help me.
There was a discussion about this same thing about 2 years ago and the
poster solved the problem using calldll. I checked last night and
calldll is available only for Python 2.1, while I'm using 2.3.

Here's a snippet from the code:

#####
import win32api, win32gui, win32con
import sys
import struct

SDI = win32api.Regist erWindowMessage ("SciTEDirector Interface");
w = win32gui.GetWin dow(win32gui.Ge tDesktopWindow( ),win32con.GW_C HILD)

while w:
res = 0;
res = win32gui.SendMe ssageTimeout(w, SDI, 0, 0,
win32con.SMTO_N ORMAL, 1000)
if res[1] != SDI:
w = win32gui.GetWin dow(w, win32con.GW_HWN DNEXT)
else:
break
n = len("goto:20") + 1
s = struct.pack(`n` + "sii", "goto:20,3" , 9, 0)

res = win32gui.SendMe ssage(w, win32con.WM_COP YDATA, s, SDI)
#####

I've tried almost every combination on the struct format.

TIA,

--
Andres Rosado
Email: andresr@despamm ed.com
ICQ: 66750646
AIM: pantear
Homepage: http://andres980.tripod.com/

We make the standards and we make the rules.
-- Standards; The Jam

[Mark Hammond]

Re: struct module usage

BW Glitch wrote:
[color=blue]
> Hi!
>
> I'm trying to send a message from a Python script to a Scite window via
> win32gui.SendMe ssage() I'm trying to pack the commands using the struct
> module. However, I can't figure out why Scite isn't responding as I
> expect. The SendMessage is returning 0.
>
> I've searched Google and haven't found anything that would help me.
> There was a discussion about this same thing about 2 years ago and the
> poster solved the problem using calldll. I checked last night and
> calldll is available only for Python 2.1, while I'm using 2.3.
>
> Here's a snippet from the code:
>
> #####
> import win32api, win32gui, win32con
> import sys
> import struct
>
> SDI = win32api.Regist erWindowMessage ("SciTEDirector Interface");
> w = win32gui.GetWin dow(win32gui.Ge tDesktopWindow( ),win32con.GW_C HILD)
>
> while w:
> res = 0;
> res = win32gui.SendMe ssageTimeout(w, SDI, 0, 0,
> win32con.SMTO_N ORMAL, 1000)
> if res[1] != SDI:
> w = win32gui.GetWin dow(w, win32con.GW_HWN DNEXT)
> else:
> break
> n = len("goto:20") + 1
> s = struct.pack(`n` + "sii", "goto:20,3" , 9, 0)
>
> res = win32gui.SendMe ssage(w, win32con.WM_COP YDATA, s, SDI)
> #####[/color]

Are you sure you are sending the correct message with the correct
params? The Windows doc for WM_COPYDATA say wparam should be a hwnd,
and lparam should be the COPYDATASTRUCT. It appears you are sending the
struct in wparam, and a custom message integer as wparam.

Further, the COPYDATASTRUCT contains pointers, not char arrays. Your
struct code will need to be more complicated. Something like:

import struct, array
int_buffer = array.array("L" , [0])
char_buffer = array.array("c" , "the string data")
int_buffer_addr ess = int_buffer.buff er_info()[0]
char_buffer_add ress, char_buffer_siz e = char_buffer.buf fer_info
copy_struct = struct.pack("pL p", # dword *, dword, char *
int_buffer_addr ess,
char_buffer_siz e, char_buffer_add ress)
# find target_hwnd somehow.
win32gui.SendMe ssage(w, WM_COPYDATA, target_hwnd, copy_struct)

Mark.