VBA/Macros mouse over to change an image

I'm very new to using VBA in general and I cannot seem to find a way to create a mouse over command to make make an image change. I am familiar with the basic trick of using a comment and formating it. That is not what I want to do here.
I want to hover the mouse over various cells or command buttons that display different regions around the world. I want the image to change so it looks like that region is highlighted when the mouse is over it.

I've supplied images for North America as an example. You'll see when the mouse is over the North American cell the image changes. Extra points for getting the cell to glow when the mouse is over it.
Of course, these are just screenshots I made to show what I'm trying to achieve here. Any assistance would be very appreciated.

Excel document:
Forum_Version.xlsx

Screenshots of what I want to do:

WorldMapTest.png

NorthAmericaTest.png

Supported PNG images to use for the document:

WorldMap.png

NorthAmerica.png