I'm running on Windows 7 and using Sun's VirtualBox, and I already shared my folders in the settings of my VirtualBox installation. The problem is I can't figure-out how I can access it. I also tried googling it, but I think I'm not doing it right.
Install the Guest Additions and setup a shared folder (if you haven't done this yet), then use the following command from a command prompt:
X: is the drive letter that will be assigned to the network drive
Replace shared with the folder name you provided when setting up the shared folder.
You should get this:
If you don't want to map the shared folder, you can always type