using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace VistaRules
{
  class CommandLinkButton : Button
  {
    // this version started at http://danielmoth.com/Blog
    public CommandLinkButton()
    {
      base.FlatStyle = FlatStyle.System;
    }

    private string helpText = "";
    public string HelpText
    {
      get
      {
        return this.helpText;
      }
      set
      {
        Win32Api.SendMessage(this.Handle, 
          0x00001609, // BCM_SETNOTE
          IntPtr.Zero, value);

        this.helpText = value;
      }
    }

    protected override CreateParams CreateParams
    {
      get
      {
        CreateParams cp = base.CreateParams;
        cp.Style |= 0x0000000e; //BS_COMMANDLINK
        return cp;
      }
    }
  }

  public static class Win32Api
  {
    [DllImport("user32", CharSet = CharSet.Unicode)]
    internal static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, string lParam);
  }
}