C#

---

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

public class MyListBox : ListBox
{
  private const int WS_VSCROLL = 0x00200000;
  protected override System.Windows.Forms.CreateParams CreateParams
  {
    get
    {
      System.Windows.Forms.CreateParams parms = base.CreateParams;
      parms.Style &= ~WS_VSCROLL;
      return parms;
    }
  }
}

public class MyListBox : ListBox
{
  private const int WS_VSCROLL = 0x00200000;
  protected override System.Windows.Forms.CreateParams CreateParams
  {
    get
    {
      System.Windows.Forms.CreateParams parms = base.CreateParams;
      if (!this.verticalScrollbar)
        parms.Style &= ~WS_VSCROLL;
      return parms;
    }
  }
  private bool verticalScrollbar;
  public virtual bool VerticalScrollbar
  {
    get { return this.verticalScrollbar; }
    set
    {
      if (this.verticalScrollbar != value)
      {
        this.verticalScrollbar = value;
        this.RecreateHandle();
      }
    }
  }
}