Answer by Frédérick Nara for Mouse Click without moving Cursor [Python]

# hwdn = window Id (Nox, or BlueStack), pos=(x, y) relative pos  in window 
def leftClick(hwnd, pos):
    lParam = win32api.MAKELONG(pos[0], pos[1])

    win32gui.SendMessage(hwnd, win32con.WM_LBUTTONDOWN, win32con.MK_LBUTTON, lParam) 
    win32gui.SendMessage(hwnd, win32con.WM_LBUTTONUP, 0, lParam)
    time.sleep(0.1)