Set focus to window based on ID using win32com.client's AppActivate

Question

I've tried the following, but focus isn't returned to the program that had focus when the script was run:

import win32com.client
import win32gui

current = win32gui.GetForegroundWindow()

shell = win32com.client.Dispatch("WScript.Shell")

shell.AppActivate('Console2')

shell.SendKeys('{UP}{ENTER}')

shell.AppActivate(str(current))

Solution

It turns out that win32gui.GetForegroundWindow() returns the window handle and not the process ID.

win32process.GetWindowThreadProcessId(hwnd) can be used to get the thread ID and process ID from the handle.

import win32com.client
import win32gui
import win32process

hwnd = win32gui.GetForegroundWindow()

_, pid = win32process.GetWindowThreadProcessId(hwnd)

shell = win32com.client.Dispatch("WScript.Shell")

shell.AppActivate('Console2')
shell.SendKeys('{UP}{ENTER}')

shell.AppActivate(pid)