Example of how to use AutoIt to automate screen positioning... Actually, python calling AutoIt and the start of using windows DLLs directly!

autoit_vnc_viewer.py

#! python
# To run this double click it in Windows File Explorer

# Notes:
#   Some interesting reading on autoit functionality direclty from windows DLLs: https://stackoverflow.com/questions/23768184/programmatically-rotate-monitor
#   Functions for win32api  http://timgolden.me.uk/pywin32-docs/contents.html
#   Directly calling the DLLs w/ ctypes: https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-getsystemmetrics

import time
import win32com.client
import win32api
import win32con
import ctypes

# Simple ctypes examples:
ctypes.windll.user32.GetSystemMetrics(78)
ctypes.windll.user32.GetSystemMetrics(79)
def getNbrDisplays():
  return ctypes.windll.user32.GetSystemMetrics(80)

class VirtualDisplay():
    '''At some point make this smart and detect the values'''
    upper_left_display_x = -516
    upper_left_display_y = -1200
    upper_left_display_width = 3850
    upper_left_display_height = 1200

vd=VirtualDisplay()        

# The real functionality to bring up vncviewer and position it correctly. (This is the first working attempt so probably rough around the edges):
Auto=win32com.client.Dispatch("AutoItX3.Control")
Auto.AutoItSetOption("SendKeyDelay", 2)
Auto.Opt("WinTitleMatchMode", 2) # 1=start, 2=subStr, 3=exact, 4=advanced, -1 to -4=Nocase
Auto.Send("#r") # Start windows command prompt
Auto.WinWait("Run", "", 10)
Auto.Send('C:\Program Files\TigerVNC\\vncviewer.exe servername.mywork.com:1{Enter}')
Auto.WinWait("[TITLE:VNC authentication]", "", 10)
Auto.Send("psswrd{ENTER}")
Auto.WinWait("[TITLE:servername]", "", 10)
# size the window slightly smaller than the display to allow us to see apps behind it
Auto.WinMove( "[TITLE:servername]", "" \
    ,vd.upper_left_display_x \
    ,vd.upper_left_display_y \
    ,vd.upper_left_display_width \
    ,vd.upper_left_display_height - 10 \
  )