On Windows, how do I get the hwnd of the window?

[tqphan]

On Windows, how do I get the hwnd of the window?

[RexBarker]

This is a WindowMngr class that finds the name of your window by the title. Works if you have only one window with that name.

import re
import win32gui
import win32com.client

class WindowMgr:
    """Encapsulates calls to the winapi for window management
    Based on:
     - https://stackoverflow.com/questions/2090464/python-window-activation
     - https://stackoverflow.com/questions/14295337/win32gui-setactivewindow-error-the-specified-procedure-could-not-be-found
    """

    def __init__(self):
        self._handle = None

    @property
    def handle(self):
        return self._handle

    def _window_enum_callback(self, hwnd, wildcard):
        """Pass to win32gui.EnumWindows() to check all the opened windows"""
        if re.match(wildcard, str(win32gui.GetWindowText(hwnd))) is not None:
            self._handle = hwnd

    def find_window_wildcard(self, wildcard):
        """find a window whose title matches the wildcard regex"""
        self._handle = None
        win32gui.EnumWindows(self._window_enum_callback, wildcard)
        return self

Use it like this:
handle = WindowMgr().find_window_wildcard("My Nice App").handle