Public Class TreenodeEx
    Inherits System.Windows.Forms.TreeNode
 
    Public Property Filepath As String = ""
    Public Property Info As String = ""
 
End Class

Dim trv As New TreeView
 
trv.Nodes.Add(New TreenodeEx With 
     {.Name = "Node 0", .Text = "Node 0", .Info = "was auch immer"})
 
Dim tn As New TreenodeEx With 
     {.Name = "Subnode 0", .Text = "Subnode 0", .Info = "irgendetwas}"}
 
trv.Nodes.Item(0).Nodes.Add(tn)