[C#]

public int NodeLevel( TreeNode node )
{
  int level = 0;
    while ( (node = node.Parent) != null ) ++level;
  return level;
}

[Visual Basic]

Public Sub NodateLevel(ByVal node as TreeNode) As Integer
  Dim level as Integer = 0
  While Not node Is Nothing
    node = node.Parent
    level = level + 1
  End While
End Sub

Mattias Sjgren