🚀 go-pugleaf

I am working on a program that enumerates the system registry.
Everything is working except certain keys. These keys always 
return a null when read by the GetKeyNames() call, even the string count is NOT zero. The two keys I am having problem with are:
	system\\controlset002\\control\\mediaResources\\JoyStick
	system\\controlset002\\control\\mediaResources\\MIDI

The following is an example. 

   TRegistry *registry = new TRegistry;
   registry->RootKey = HKEY_LOCAL_MACHINE;
   TStringList *keys = new TStringList();
   if( registry->OpenKey(KeyPath, false) ) {
      if( registry->HasSubKeys() ) {
         registry->GetKeyNames(keys);
         registry->CloseKey();
         Edit1->Text = keys->Strings[0];// keys->Strings[0]=NULL
         Edit2->Text = IntToStr(keys->Count);// keys->count=1
      }
   }

What am I missing? Is there some global parameters I need to set first? Thanks!

Gene