Hides the red box around a Skype screenshare

snb.py

'''
Brief:
    snb.py - Removes the red border Skype makes when screensharing.
        Also sets Skype to low priority with a processor affinity to only run on one cpu/core.
            This should help keep game/other app performance decent.
    
Description:
    Run the script once when the border is up, and it will go away
    (C) - MIT License - 2017
    
Author(s):
    Charles Machalow
'''

from ctypes import windll, c_char_p

import multiprocessing
import subprocess

SKYPE_LOW_PRIORITY_CMD = r'"C:\Windows\System32\wbem\WMIC.exe" process where name="skype.exe" CALL setpriority "idle"'
SKYPE_AFFINITY = 'PowerShell "$Process = Get-Process skype; $Process.ProcessorAffinity=%d"'
SW_HIDE = 0


def getWindowHwnd(className, windowName=None):
    '''
    Brief:
        Attempts to get an hwnd object via the FindWindow WinApi callable
        
    Author(s):
        Charles Machalow
    '''
    if windowName:
        return windll.user32.FindWindowA(c_char_p(className.encode()), c_char_p(windowName.encode()))
    return windll.user32.FindWindowA(c_char_p(className.encode()), None)
        
        
def setSkypeToLowestPriority():
    '''
    Brief:
        Sets the Skype application to low priority and only allows it to run on one cpu/core
        
    Author(s):
        Charles Machalow
    '''
    # low priority
    subprocess.check_output(SKYPE_LOW_PRIORITY_CMD, shell=True)
    
    # affinity to just last core
    numCpu = multiprocessing.cpu_count()
    bitMask = 1 << (numCpu - 1)
    subprocess.check_output(SKYPE_AFFINITY % bitMask, shell=True)
    
    
if __name__ == '__main__':
    # Hide all of the red-border windows
    hwnd = getWindowHwnd('TLiveConversationWindow')
    windll.user32.ShowWindow(hwnd, SW_HIDE)
    hwnd = getWindowHwnd('TSimpleSelection')
    windll.user32.ShowWindow(hwnd, SW_HIDE)
    setSkypeToLowestPriority()