Identifying NTFS junction point

Hi all,
I have created the junction point by creating mountpoint in empty NTFS folder option from ComputerManagement—>DiskManagement , right clicking on the volume.

it goes like this: my destination volume drive is g: and source is C:\UNC

I am running windows service which removes the destination volume (that is the removable drive) using DeleteVolumeMountPoint() , but it only ejects the destination drive (ie removable drive) , the c:\unc is still available and can be accessible. Can any body help me out how to delete that also. If I select the “Eject” option by selecting removable drive (from ComputerManagement—>DiskManagement ) then c:\unc also becomes unavailable…

Thnx in advance