Recently I have developed one VS 2010 Extension called ZoomSliderVSX. ZoomSliderVSX is an add-on functionality to zoom your source code inside VS 2010 Editor. Though VS 2010 having inbuilt Zoom Level dropdown list to change the ZoomLevel value, but I didn’t find anything like Scrollable zoom features which is one of the most common features for any MS products. So here is ZoomSlider VS2010 Extension which will give the scrollable zoom functionality very easily.
Zoom Slider

I have published the addins in MSDN Site. You can download it from MSDN Visual Studio Gallery

I will publish one complete article with source code @Codeproject Very Soon.

Please provide me your suggestion and feedback for improvement.