C#

public void BuildTree(DataSet ds)
{
  // Don't forget error checking throughout this code!
  DataRow[] roots = ds.Table[0].Select("ParentID = 0 OR ParentID IS NULL");
  foreach (DataRow root in roots)
  {
    BuildTreeHelper(root, myTreeView.Nodes);
  }
}
public void BuildTreeHelper(DataRow row, TreeNodeCollection nodes)
{
  TreeNode node = CreateNodeFromData(row);
  nodes.Add(node);

  DataRow[] rows = row.Table.Select("ParentID = " + node.Tag);
  foreach (DataRow row in rows)
    BuildTreeHelper(row, node.Nodes);
}
public TreeNode CreateNodeFromData(DataRow row)
{
  TreeNode node = new TreeNode();
  node.Text = row["Name"];
  node.Tag = row["ID"];
  // Whatever...

  return node;
}

HWND hWnd = FindWindow(NULL, "MyApp");
RECT rc;
GetClientRect(hWnd, &rc);
HDC hDC = GetDC(hWnd);
HDC hCDC = CreateCompatibleDC(hDC);
int width = rc.right - rc.left;
int height = rc.bottom - rc.top;
BitBlt(hCDC, 0, 0, width, height, hDC, 0, 0, SRCCOPY | CAPTUREBLT);