Update: Please note I have an update to this post available here.
Standard windows forms tree and listview controls look rather dated on Vista, with a blue background to indicate a selected node or item
It is very easy to update both these controls to have the vista look and feel with three lines of code by calling the SetWindowsTheme method. This is ignored on XP so adding this code will not affect the same application running on XP.
C#
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace VistaTheme
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
SetWindowTheme(treeView1.Handle, “explorer”, null);
SetWindowTheme(listView1.Handle, “explorer”, null);
}
[DllImport(“uxtheme.dll”, CharSet = CharSet.Unicode, ExactSpelling = true)]
private static extern int SetWindowTheme(IntPtr hWnd, string appName, string partList);
private void Form1_Load(object sender, EventArgs e)
{
treeView1.ExpandAll();
}
}
}
Visual Basic
Imports System.Runtime.InteropServices
Public Class Form1
<DllImport(“uxtheme.dll”, CharSet:=CharSet.Unicode, ExactSpelling:=True)> _
Private Shared Function SetWindowTheme(ByVal hWnd As IntPtr, ByVal appName As String, ByVal partList As String) As Integer
End Function
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
SetWindowTheme(treeView1.Handle, “explorer”, Nothing)
SetWindowTheme(listView1.Handle, “explorer”, Nothing)
treeView1.ExpandAll()
End Sub
End Class
Ira Lukhezo's blog 
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