Big, big thank you musefan and Ian! I’ve now got it working brilliantly. Based on the pseudo-code Ian posted (which worked great after tweeking!) I’ve decided to post the working code incase anyone else out there is experiencing TreeNode’s from hell lol. "ps, i'm not great with codeproject, so if you know of a better place for me to post this answer, please let me know." Well here’s the working code… :-D :thumbsup: Add a TreeView control to Form1 and name it treeView1. and then add this code.. private void Form1_Load(object sender, EventArgs e) { TreeNode tn = new TreeNode("Root"); // set PathSeparator to url paths treeView1.PathSeparator = "/"; // Create any old folders and process InsertURL(tn, @"mywebsite.com/home/about_us.aspx"); InsertURL(tn, @"mywebsite.com/home/contact_us.aspx"); InsertURL(tn, @"mywebsite.com/home/main.aspx"); InsertURL(tn, @"mywebsite.com/blogs/seo.aspx"); InsertURL(tn, @"mywebsite.com/blogs/linkchecks.aspx"); InsertURL(tn, @"mywebsite.com/blogs/howto/gettheresults.aspx"); //add nodes to treeView treeView1.Nodes.Add(tn); } private void InsertURL(TreeNode root, string url) { InsertURL(root, SplitNodes(url), 0); } private string[] SplitNodes(string nodeString) { char[] delimiter = treeView1.PathSeparator.ToCharArray(); return nodeString.Split(delimiter, StringSplitOptions.RemoveEmptyEntries); } private void InsertURL(TreeNode parent, string[] urlParts, int index) { // Create the node if it doesn't exist. CreateNode(parent, urlParts[index]); // get the next urlPart index++; if (index < urlParts.Length) { InsertURL(parent.Nodes[urlParts[index-1]], urlParts, index); } } private static void CreateNode(TreeNode treeNode, string name) { // Add the node if it don't exist if (treeNode.Nodes[name] == null) { treeNode.Nodes.Add(name, name); } } modified on Saturday, March 28, 2009 5:57 AM

Hi, the short answer to your question is no. The win32 system does not support semi-transparent controls in the way you want it. However, considering that you're UserControl is painting an image, there is an alternative way - as long as you're only painting over other graphics & not over controls (buttons, textboxes etc.). Any image you want to paint can be adjusted so that it's semi-transparent. Ditch the UserControl & paint the image from the main form by overriding the OnPaint method. Here's the code to adjust the image transparency. You'll need to enable the 'Allow unsafe code' option in the project Build properties. private Bitmap \_transImage = null; public Form1() { InitializeComponent(); } ~Form1() { \_transImage.Dispose(); } protected override void OnLoad(EventArgs e) { Bitmap b = new Bitmap(@"c:\\myImage.png"); \_transImage = AdjustImageTransparency(b); b.Dispose(); base.OnLoad(e); } protected override void OnPaint(PaintEventArgs e) { e.Graphics.DrawImage(\_transImage, new Rectangle(40, 40, \_transImage.Width, \_transImage.Height)); base.OnPaint(e); } private Bitmap AdjustImageTransparency(Bitmap sourceImage) { // image must be 32bpp to allow transparency adjustment, so paint source to transImage gc Bitmap transImage = new Bitmap(sourceImage.Width, sourceImage.Height, PixelFormat.Format32bppArgb); Rectangle rc = new Rectangle(Point.Empty, sourceImage.Size); using (Graphics g = Graphics.FromImage(transImage)) g.DrawImage(sourceImage, rc); // lock transImage for direct memory manipulation BitmapData bd = transImage.LockBits(rc, ImageLockMode.ReadWrite, transImage.PixelFormat); AdjustTransparency(bd, 0.5f); // must always unlock the memory when finished transImage.UnlockBits(bd); return transImage; } private unsafe void AdjustTransparency(BitmapData dataObj, float ratio) { // calc the number of bytes that represent a single row int byteWidth = dataObj.Width \* 4; for (int y = 0; y < dataObj.Height; y++) { // calc memory location for row(y) byte\* row = (byte\*)dataObj.Scan0 + dataObj.S