private void MainForm_Load(object sender, System.EventArgs e)
{
	IEnumerator de = directoryEntry1.Children.GetEnumerator();
	de.Reset();
	while(de.MoveNext())
	{
		TreeNode n = treeView1.Nodes.Add((de.Current as System.DirectoryServices.DirectoryEntry).Path);
		n.Nodes.Add( "");
	}
}

private void treeView1_BeforeExpand(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)
{
	if(e.Node.Nodes.Count == 1 )
	{
		e.Node.Nodes.Clear();
		directoryEntry1.Path = e.Node.Text;
		IEnumerator de = directoryEntry1.Children.GetEnumerator();
		de.Reset();
		while(de.MoveNext())
		{
			TreeNode n = e.Node.Nodes.Add((de.Current as System.DirectoryServices.DirectoryEntry).Path);
			n.Nodes.Add("");
		}
	}
}

DWORD WNetEnumResource(
  HANDLE hEnum,
  LPDWORD lpcCount,
  LPVOID lpBuffer,
  LPDWORD lpBufferSize
);

typedef struct _NETRESOURCE {
  DWORD dwScope;
  DWORD dwType;
  DWORD dwDisplayType;
  DWORD dwUsage;
  LPTSTR lpLocalName;
  LPTSTR lpRemoteName;
  LPTSTR lpComment;
  LPTSTR lpProvider;
} NETRESOURCE;

[DllImport( "mpr.dll" , EntryPoint= "WNetEnumResource" , CallingConvention=CallingConvention.StdCall)]
private static extern int WNetEnumResource(int hEnum, int lpcCount, ????? lpBuffer, int lpBufferSize);