How to reference a folder within the current folder

[dpaton05]

I have an add in that I need to run whenever excel is started. I have gone to file-options-advanced, and under the general heading, there is a box next to "At start-up, open all files in:" and you can put the full directory of the folder you want to allow here. Is there a way to write the current folder in here so if the file and files around it is moved to a different location but with the same directory structure, it will open the add in from the new location?