How to access shared folder in Windows host from Ubuntu guest

1. Create shared folder in Windows.
   The is the source folder.  For example: e:\ubuntu_share
2. Specify the shared folder in the Ubuntu guest configuration.
   
3. Create destination folder in Ubuntu.
   For example: /myshare
4. Open a Terminal window in Ubuntu.
5. Type:
   sudo mount -t vboxsf <source folder> <destination folder>
   For example:
   sudo mount -t vboxsf ubuntu_share /myshare