[python-win32] help writing text to a windows edit control

[Richard Leahy]

Hi guys. I have been struggling with writing a string into an edit control using the windows api calls. What I have noticed is that if i write text to a different control like a button control for example it works. Is there something in place like a security thing that prevents writing to an edit control? code below. thanks. I have put my C code at the very bottom for reference. 

import os,sys,subprocess,time
from subprocess import *
from os import *
from ctypes import *
from ctypes.wintypes import *

PROCESS_ALL_ACCESS =     ( 0x000F0000 | 0x00100000 | 0xFFF )
kernel32 = windll.kernel32
pid      = sys.argv[1]

h_process = kernel32.OpenProcess( PROCESS_ALL_ACCESS, False, int(pid) )

if not h_process:
    print "[*] Couldn't acquire a handle to PID: %s" % pid
    sys.exit(0)

# parent window
window_handle = windll.user32.FindWindowA(None, "Windows App")

if not window_handle:
    print "[*] cant find window"
    sys.exit(0)

my_string = "testing"

windll.user32.SetDlgItemTextA(window_handle,1, my_string)



C CODE

    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Windows App",       /* Title Text */
           WS_OVERLAPPEDWINDOW, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           544,                 /* The programs width */
           375,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );
           


 CreateWindow( "EDIT", "",
          WS_VISIBLE|WS_CHILD,
          0, 0, 300, 50, hwnd, (HMENU)1, hThisInstance, NULL);

    

CreateWindow( "BUTTON", "",
 WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
 0, 50, 100, 30, hwnd, (HMENU)2, hThisInstance, NULL);
 		 	   		  
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