Virtual Box and Windows 7 (extend hard drive space)

Today ran into an issue where I ran out of hard drive space on my guest Windows 7 VDI image.  I originally left the default settings for hard drive space so it was initially only set to 25GB which filled up pretty fast.  I should of known better, everyone knows Microsoft just gets worse and worse when it comes to taking up hard drive space.

All I did was open a Terminal session and ran

VBoxManage modifyhd /Users/dennis/VMs/VirtualBox/HP COE Win7-64bit/HP COE Win7-64bit.vdi --resize 81920

Now, I would of never of figured out the different forward versus reverse slashes so I just typed at the Terminal window

VBoxManage modifyhd and then found the .vdi image in Finder and dragged it to the terminal then added --resize 81920 at the end which expands the 25GB image to 80GB.

Now I boot up Windows 7 and right click on My Computer and select Manage.  I go down to where it says Disk Management, right click on C: and select Expand Volume and use all existing free space.