Create an Excel Add In - To create Process Maps

The end goal of the add in is to create a Process map from user input.

Here's how I envision the add in to work:
1 - ask users for input (process name, process type, and the amount of time it takes)
2 - The add in will create boxes with the info and organize the user input into a process map, similar to this:
http://california-lean.com/images/value%20stream%20map%20-%20steves%20skateboard%20lean.jpg

3- The output will be scaled and centered to fit one page, and the screen will have three buttons: (save, print. another map)