I am trying to follow this answer and i have reached the point where a should call
GetGUIThreadInfo()
but i cannot find that in the pywin32 docomentation i am using.
What i have done so far is
import win32api
import win32gui
import win32process
test1 = win32gui.FindWindowEx(0, 0, 0, "notepad")
(test1tid, test1pid) = win32process.GetWindowThreadProcessId(test1)
test1hwndFocus = win32process.GetGUIThreadInfo(test1tid)
but the last line is compleatly made up as i cannot find the right way to call the function.
Update1:
Think i made some progress but now my struct just returns 0 when i expect some hwnd... so maybe my struct is not writen to, i think this could be because of the types in my struct, but how do i find the right types?
import win32api
import win32gui
import win32process
import ctypes
class RECT(ctypes.Structure):
_fields_ = [
("left", ctypes.c_ulong),
("top", ctypes.c_ulong),
("right", ctypes.c_ulong),
("bottom", ctypes.c_ulong)
]
class GUITHREADINFO(ctypes.Structure):
_fields_ = [
("cbSize", ctypes.c_ulong),
("flags", ctypes.c_ulong),
("hwndActive", ctypes.c_ulong),
("hwndFocus", ctypes.c_ulong),
("hwndCapture", ctypes.c_ulong),
("hwndMenuOwner", ctypes.c_ulong),
("hwndMoveSize", ctypes.c_ulong),
("hwndCaret", ctypes.c_ulong),
("rcCaret", RECT)
]
guiThreadInfoStruct = GUITHREADINFO()
ctypes.sizeof(gtitest)
test1 = win32gui.FindWindowEx(0, 0, 0, "notepad")
(test1tid, test1pid) = win32process.GetWindowThreadProcessId(test1)
ctypes.windll.user32.GetGUIThreadInfo(test1tid, guiThreadInfoStruct)
print (guiThreadInfoStruct.hwndFocus)
Update2:
I found the types here
update3:
If anyone wanna see what i used this for go look here
Apparently, [MS.Docs]: GetGUIThreadInfo function is not wrapped by PyWin32, so alternative ways must be used. One of them is calling it via [Python 3.Docs]: ctypes - A foreign function library for Python (involves writing a lot of extra code).
code00.py:
#!/usr/bin/env python
import sys
import win32gui as wgui
import win32process as wproc
import win32con as wcon
import ctypes as ct
from ctypes import wintypes as wt
class GUITHREADINFO(ct.Structure):
_fields_ = [
("cbSize", wt.DWORD),
("flags", wt.DWORD),
("hwndActive", wt.HWND),
("hwndFocus", wt.HWND),
("hwndCapture", wt.HWND),
("hwndMenuOwner", wt.HWND),
("hwndMoveSize", wt.HWND),
("hwndCaret", wt.HWND),
("rcCaret", wt.RECT),
]
def __str__(self):
ret = "\n" + self.__repr__()
start_format = "\n {0:s}: "
for field_name, _ in self. _fields_[:-1]:
field_value = getattr(self, field_name)
field_format = start_format + ("0x{1:016X}" if field_value else "{1:}")
ret += field_format.format(field_name, field_value)
rc_caret = getattr(self, self. _fields_[-1][0])
ret += (start_format + "({1:d}, {2:d}, {3:d}, {4:d})").format(self. _fields_[-1][0], rc_caret.top, rc_caret.left, rc_caret.right, rc_caret.bottom)
return ret
def main(*argv):
window_name = "Untitled - Notepad"
hwnd = wgui.FindWindowEx(wcon.NULL, 0, wcon.NULL, window_name)
print("'{0:s}' window handle: 0x{1:016X}".format(window_name, hwnd))
tid, pid = wproc.GetWindowThreadProcessId(hwnd)
print("PId: {0:d}, TId: {1:d}".format(pid, tid))
user32_dll = ct.WinDLL("user32.dll")
GetGUIThreadInfo = getattr(user32_dll, "GetGUIThreadInfo")
GetGUIThreadInfo.argtypes = [wt.DWORD, ct.POINTER(GUITHREADINFO)]
GetGUIThreadInfo.restype = wt.BOOL
gti = GUITHREADINFO()
gti.cbSize = ct.sizeof(GUITHREADINFO)
res = GetGUIThreadInfo(tid, ct.byref(gti))
print("{0:s} returned: {1:d}".format(GetGUIThreadInfo.__name__, res))
if res:
print(gti)
if __name__ == "__main__":
print("Python {0:s} {1:d}bit on {2:s}\n".format(" ".join(item.strip() for item in sys.version.split("\n")), 64 if sys.maxsize > 0x100000000 else 32, sys.platform))
main(*sys.argv[1:])
print("\nDone.")
Output:
e:\Work\Dev\StackOverflow\q059884688>"e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" code00.py Python 3.7.6 (tags/v3.7.6:43364a7ae0, Dec 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)] 64bit on win32 'Untitled - Notepad' window handle: 0x00000000042B20D8 PId: 37192, TId: 53072 GetGUIThreadInfo returned: 1 <__main__.GUITHREADINFO object at 0x0000022649436648> cbSize: 0x0000000000000048 flags: 0 hwndActive: None hwndFocus: None hwndCapture: None hwndMenuOwner: None hwndMoveSize: None hwndCaret: None rcCaret: (0, 0, 0, 0) Done.
Notes: