Get Hwnd of Each Window

Get HWND of each Window?

You mixed up ctypes and win32gui.

The hwnd you've got is obtained via ctypes and is a LP_c_long object. That's why win32gui.MoveWindow didn't accept it. You should pass it to

ctypes.windll.user32.MoveWindow(titles[5][0], 0, 0, 760, 500, True)

If you want to use win32gui.MoveWindow, you can use python function as callback directly.
For example,

import win32gui

def enumHandler(hwnd, lParam):
    if win32gui.IsWindowVisible(hwnd):
        if 'Stack Overflow' in win32gui.GetWindowText(hwnd):
            win32gui.MoveWindow(hwnd, 0, 0, 760, 500, True)

win32gui.EnumWindows(enumHandler, None)

How to get the hWnd of Window instance?

WindowInteropHelper is your friend. It has a constructor that accepts a Window parameter, and a Handle property that returns its window handle.

Window window = Window.GetWindow(this);
var wih = new WindowInteropHelper(window);
IntPtr hWnd = wih.Handle;

Get all window handles for a process

Pass IntPtr.Zero as hWnd to get every root window handle in the system.

You can then check the windows' owner process by calling GetWindowThreadProcessId.

How to get handle for a specific application window in Python using pywin32?

You can use EnumWindows(),this will search all the window,Read it in MSDN doc:

import win32gui

def getShell():
    thelist = []
    def findit(hwnd,ctx):
        if win32gui.GetWindowText(hwnd) == "Windows PowerShell": # check the title
            thelist.append(hwnd)

    win32gui.EnumWindows(findit,None)
    return thelist

b = getShell()
print(b) # b is the list of hwnd,contains those windows title is "Windows PowerShell"

pywin32: how to get window handle from process handle and vice versa

Enumerate windows and then get the process handle for each window

You need these APIs:

• win32gui.EnumWindows() to enumerate all top-level windows (that is no child windows aka controls)
• win32process.GetWindowThreadProcessId() to get process ID from window handle
• win32api.OpenProcess() to get process handle from process ID

Enumerate processes and then get the main application window handle
for each process

You need these APIs:

• win32process.EnumProcesses() to enumerate all processes
• win32api.GetWindowLong() with argument GWL_STYLE to get window styles and GWL_EXSTYLE to get extended window styles
• win32gui.GetParent() to determine unowned windows

By filtering the result of EnumWindows() using GetWindowThreadProcessId() you can get all windows that belong to a given process.

Determining the main window can be tricky as there is no single window style that would designate a window as the main window. After all, an application might have multiple main windows.

Best you could do is to use the same rules that the taskbar uses to determine application windows, because that's what the user perceives as main windows:

The Shell places a button on the taskbar whenever an application
creates an unowned window—that is, a window that does not have a
parent and that has the appropriate extended style bits.

To ensure that the window button is
placed on the taskbar, create an unowned window with the
WS_EX_APPWINDOW extended style. To prevent the window button from
being placed on the taskbar, create the unowned window with the
WS_EX_TOOLWINDOW extended style. As an alternative, you can create a
hidden window and make this hidden window the owner of your visible
window.

Use GetParent() and GetWindowLong() to determine the unowned windows that have the right window styles according to these rules.

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