Hi,

I had the same problem some time ago.
I had to implement the recursion my self, here is how I did it:

private void GetVssProjectVersion(string Spec, string GetPath, string
Version, bool Recursive)
{
   VSSItem VSSProject;
   VSSItem VSSProjectVersion;

   VSSProject = mVSSDatabase.get_VSSItem(Spec,false);
   VSSProjectVersion = VSSProject.get_Version("Version " + Version);

   VSSProjectVersion.Get(ref GetPath,0);

    if(Recursive == true)
   {
       IVSSItems items = VSSProject.get_Items(false);

       foreach(VSSItem Item in items)
       {
            if(Item.Type == (int)VSSItemType.VSSITEM_PROJECT)
            {
                  GetVssProjectVersion(Spec + "/" + Item.Name,GetPath +
"\\" +Item.Name,Version,Recursive);
             }
        }
   }
}

On a side note:
If you are going to add items, then label them from code, make sure that you
don't do things to fast.
I was migrating several thousand versions from our old archive(UNIX) to
SourceSafe, and wrote a program to do it.
The problem I discovered was that things got labeled wrong, several versions
got checked in before the label was set.
The solution was to introduce a 1.5 second delay between the add and label
operation.

The program I wrote was in VB6 and used VSS prior to 6.0c that came with
VS.NET so things may have changed,
but you should be aware that it might still be a problem.

Chris