Microsoft Excel & VBA

I was asked to develop a form where user can see a pdf thumbnail of a pdf file. It was pretty far from what I have been developing so I decided to use "uncle" google to find a solution. There are some solutions but nothing what was expecting. You can use paid version of Adobe or free Adobe Acrobat ActiveX (Acropdf1) or some others free tools that can work along a pdf file. I tested only the free version of Acrobat ActiveX component and it was really nightmare. Then I found a C# project using the GhostScript tool for creating a pdf thumbnail. Unfortunately VBA cannot work with this project directly. Read more to find solution.

This article is not so about MS Excel however it's indirectly related to. My colleague asked me how to quick change decimal places in embedded charts in the PowerPoint application. I did a little research and I didn't find any solution for PowerPoint 2007 or 2010. I think Powerpoint doesn't have any button for doing that directly from Ribbon so I came up with my own Add-in.