Searching through many SO post like this , I was able to come up with following code to access Windows File Open dialog box. Basically I need to specify a file in this dialog box which opened by another app (No option to use tKinter, not a web app). I am getting error as following
EnumChildWindows(currentHwnd,_windowEnumerationHandler,childWindows) ctypes.ArgumentError: argument 2: : Don't know how to convert parameter 2
What am I missing here? Is there any other way to achieve this functionality?
import ctypes
import win32gui
EnumWindows = ctypes.windll.user32.EnumWindows
EnumWindowsProc = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
SendMessage = ctypes.windll.user32.SendMessageW
IsWindowVisible = ctypes.windll.user32.IsWindowVisible
EnumChildWindows = ctypes.windll.user32.EnumChildWindows
WM_SETTEXT = 0x000C
def _windowEnumerationHandler(hwnd, resultList):
#Pass to win32gui.EnumWindows() to generate list of window handle,
# window text, window class tuples.
resultList.append((hwnd, win32gui.GetClassName(hwnd)))
def searchChildWindows(currentHwnd,
wantedText=None,
wantedClass=None,
selectionFunction=None):
childWindows = []
result =[]
EnumChildWindows(currentHwnd,_windowEnumerationHandler,childWindows)
for childHwnd, windowText, windowClass in childWindows:
descendentMatchingHwnds = searchChildWindows(childHwnd)
if wantedClass == windowClass:
result.append(childHwnd)
return childHwnd
def getEditBox(hwnd):
children = list(set(searchChildWindows(hwnd, 'ComboBoxEx32')))
for addr_child in children:
if (win32gui.GetClassName(addr_child) == 'Edit'):
print(f"found TextBox")
SendMessage(hwnd, WM_SETTEXT, 0, "Can I change this title?")
def foreach_window_child(hwnd, lParam):
if IsWindowVisible(hwnd):
length = GetWindowTextLength(hwnd)
buff = ctypes.create_unicode_buffer(length + 1)
GetWindowText(hwnd, buff, length + 1)
if (buff.value == "Open"): # This is the window label
print(f"foreach_window_child found it")
#SendMessage(hwnd, WM_SETTEXT, 0, "Do u see me ") # Changes the title of dlg box
getEditBox(hwnd)
return True
EnumWindows(EnumWindowsProc(foreach_window_child), 0)
