C#

protected override void OnPaint(PaintEventArgs e)
{
  if (e.ClipRectangle != Bounds) { /* we're partly hidden */ }
  base.OnPaint(e);
}

using System;
using System.Drawing;
using System.Windows.Forms;
 
class Test : Form
{
  static void Main()
  {
    Application.Run(new Test());
  }
 
  Label lbl;
 
  Test()
  {
    Text = "Sample";
    AutoScroll = true;
 
    lbl = new Label();
    Controls.Add(lbl);
    lbl.Location = new Point(0, 0);
    lbl.Size = Size + Size;
    lbl.TextAlign = ContentAlignment.MiddleCenter;
  }
 
  protected override void OnResize(EventArgs e)
  {
    lbl.Size = Size + Size;
    base.OnResize(e);
  }
 
  const int WM_HSCROLL = 0x0114; // == 276
  const int WM_VSCROLL = 0x0115; // == 277
 
  protected override void WndProc(ref Message m)
  {
    if (m.Msg == WM_HSCROLL)
    {
      lbl.Text = string.Format("HPos: {0}", HIWORD((int)m.WParam));
    }
 
    if (m.Msg == WM_VSCROLL)
    {
      lbl.Text = string.Format("VPos: {0}", HIWORD((int)m.WParam));
    }
 
    base.WndProc(ref m);
  }
 
  int HIWORD(int dword)
  {
    return dword >> 16;
  }
}

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"When the only tool you have is a hammer, a sore thumb you will have."