Use data from ArcGIS.com

Hi,

I was just wanting to see if this is possible.
I have an ArcGIS Online Account and have been messing around with some of the data capture methods.

I have noticed you can save a MXD with the data from my maps that I have created.

I was wondering, if I wanted to run a GP on one of these datasets using VB.NET, how would I gain access to the path?
Reason I ask is usually when I run a Geoprocessing Tool I use the GP.In_Features = "C:\test.shp" , however because this data is not on a local drive, I am a little unsure how to go about doing this.

Can it be done? If so, how?
Many thanks,

K