[How is the Glow Effect Plugin Programmed?]

Wow, I wasn't even thinking of this approach and was thinking that the glow effect alters the RGB channels directly based on some algorithm. Thank You for the algorithm @toe_head2001.  I'll try to convert the instructions into code and will post the results. 

[How is the Glow Effect Plugin Programmed?]

Hello everyone.
I've been using paint.net to make my drawings/graphics glow using Effects>Photo>Glow which is great, but now i need to create some dynamic glow effects for my game, and I was wondering if anyone has any idea how the Glow Effect is programmed? and what algorithm was used for it?
Thanks