我们从Python开源项目中，提取了以下5个代码示例，用于说明如何使用win32gui.SendMessageTimeout()。
def TestObjectFromWindow(): # Check we can use ObjectFromLresult to get the COM object from the # HWND - see KB Q249232 # Locating the HWND is different than the KB says... hwnd = win32gui.FindWindow('IEFrame', None) for child_class in ['TabWindowClass', 'Shell DocObject View', 'Internet Explorer_Server']: hwnd = win32gui.FindWindowEx(hwnd, 0, child_class, None) # ack - not working for markh on vista with IE8 (or maybe it is the # lack of the 'accessibility' components mentioned in Q249232) # either way - not working! return # But here is the point - once you have an 'Internet Explorer_Server', # you can send a message and use ObjectFromLresult to get it back. msg = win32gui.RegisterWindowMessage("WM_HTML_GETOBJECT") rc, result = win32gui.SendMessageTimeout(hwnd, msg, 0, 0, win32con.SMTO_ABORTIFHUNG, 1000) ob = pythoncom.ObjectFromLresult(result, pythoncom.IID_IDispatch, 0) doc = Dispatch(ob) # just to prove it works, set the background color of the document. for color in "red green blue orange white".split(): doc.bgColor = color time.sleep(0.2)
def set_env_variables_permanently_win(key_value_pairs: Dict[str, Any], whole_machine: bool = False): """ Similar to os.environ[var_name] = var_value for all pairs provided, but instead of setting the variables in the current process, sets the environment variables permanently at the os MACHINE level. Recipe from http://code.activestate.com/recipes/416087/ :param key_value_pairs: a dictionary of variable name+value to set :param whole_machine: if True the env variables will be set at the MACHINE (HKLM) level. If False it will be done at USER level (HKCU) :return: """ try: path = r'SYSTEM\CurrentControlSet\Control\Session Manager\Environment' if whole_machine else r'Environment' reg = ConnectRegistry(None, HKEY_LOCAL_MACHINE if whole_machine else HKEY_CURRENT_USER) key = _open_key(reg, path, whole_machine) if key_value_pairs is None: # print all values.. show_win(key) else: for name, value in key_value_pairs.items(): if name.upper() == 'PATH': # TODO maybe remove this security ? warn('PATH can not be entirely changed. The value will be simply appended at the end.') value = query_value_win(path, key, name, whole_machine) + ';' + value if value: print("Setting ENV VARIABLE '" + name + "' to '" + value + "'") SetValueEx(key, name, 0, REG_EXPAND_SZ, value) else: print("Deleting ENV VARIABLE '" + name + "'") try: DeleteValue(key, name) except FileNotFoundError: # ignore if already deleted pass # this hangs forever, see https://stackoverflow.com/questions/1951658/sendmessagehwnd-broadcast-hangs # win32gui.SendMessage(win32con.HWND_BROADCAST, win32con.WM_SETTINGCHANGE, 0, 'Environment') print("Broadcasting change to other windows") win32gui.SendMessageTimeout(win32con.HWND_BROADCAST, win32con.WM_SETTINGCHANGE, 0, 'Environment', win32con.SMTO_ABORTIFHUNG, 1000) finally: # Always try to close everything in reverse order, silently try: CloseKey(key) except: pass try: CloseKey(reg) except: pass
