Maximise minimise chart window (convert simple MT4 indicator into MT5)

This script has already been done for me in MT4 but i need it for MT5 and i don't have the source file.

I need a simple script to maximise a chart within the MT5 window and restore the chart down again (minimize it) back and forwards. When i say restore down i mean make the chart smaller and not fully maximized (NOT minimise it to the bottom of the screen where you cannot see the chart). The script should be able to be assigned to a hotkey. So the hotkey would maximise the selected chart and then, when pressed again, restore it down to its original size and position within the MT5 platform window enabling you to switch between the two states easily. So if you had 4 charts tiled it would maximise one that was selected then restore it (minimize it) back to its original position. Very simple. 

Here is the video of the script in MT4 which was done for me http://youtu.be/DVBKxnubqI0  

the file is attached and i would like the MT5 version to work in the same way. Thanks