How to trace "Discovered Virtual Machine" through VI SDK 4

Hi All

I have used the below piece of code

ManagedObjectReference vmFolderRef = (ManagedObjectReference)getObjectProperty(datacenterRef, "vmFolder");

            // Find the virtual machine list from the virtual machine folder found above.

            ManagedObjectReference[] vmList = (ManagedObjectReference[])getObjectProperty(vmFolderRef, "childEntity");

but i am not getting the entire list of Virtual Machine on my Vcenter ,

when I open my VCenter console through Vpshere Client , I can see there a folder name Discovered Virtual Machine and my code is not able to find all the VMs under this folder

Can anyone suggest where i have to change the code or what keyword I have to pass instead of "vmFolder"

Its really Urgent