Modding the Progress Bar

[zmanalpha]

Hello Guys! i'm not sure if any one will get what i'm saying but ill give it a go. if you go into visual studio and it's loading a project a dialogue pops up and says something along the lines of "your project is loading" and there is a progress bar that doesn't really show its progress but more of a green blob that goes across the actual bar. Does anyone know how to create that or gain access to something like that? Help is much appreciated!
--Zach