C#_SRC:Shaped Form from Bitmap

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class ShapedForm : Form
{
    #region Bob Powell's GDI+ FAQ Banner
    /********************************************************************************     * This code is part of Bob Powell's GDI+ FAQ
     * You may use this code free from royalties in a commercial project on condition 
     * that you buy yourself a book or DVD from the following link to Amazon or make 
     * a donation of your choice.
     * 
     * http://www.amazon.com/exec/obidos/redirect-home/bobpowelnet
     * 
     * You can make a donation to the upkeep of the GDI+ FAQ by using
     * PayPal from the following link.
     * 
     * https://www.paypal.com/xclick/business=bob%40bobpowell.net&item_name=GDI%
2B+FAQ&item_number=1&no_note=1&tax=0&currency_code=USD
     * 
     * If this code helped you, just imagine what I can do for you as a part of 
     * your team.
     * 
     * My consulting rates start at just $30 an hour and I sell blocks of hours
     * to provide you with projects, architecture, programming solutions and mentoring
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     * http://www.bobpowell.net
     * ********************************************************************************
     * License:
     * This code is provided with no warranty and is not guaranteed to be free from defects 
     * or fit for merchantability or for any other purpose. By incorporating this code 
     * into your own projects you do so at your own risk and agree to hold Robert W. Powell
     * free from responsibility for all damages that may arise from such use
     * If you redistribute this source code or any portion of it in any human readable form
     * you must include the full text of this information panel and license.
     * ********************************************************************************/
    #endregion
    private Region GetRegion(Bitmap _img, Color color)
  {
    Color _matchColor=Color.FromArgb(color.R,color.G,color.B);
    System.Drawing.Region rgn= new Region();
    rgn.MakeEmpty();
    Rectangle rc=new Rectangle(0,0,0,0);
    bool inimage=false;
    for(int y=0; y<_img.Height;y++)
    {
      for(int x=0;x<_img.Width;x++)
      {
        if(!inimage)
        {
          if(_img.GetPixel(x,y)!=_matchColor)
          {
            inimage=true;
            rc.X=x;
            rc.Y=y;
            rc.Height=1;
          }
        }
        else
        {
          if(_img.GetPixel(x,y)==_matchColor)
          {
            inimage=false;
            rc.Width=x-rc.X;
            rgn.Union(rc);  
          }
        }
      }
      if(inimage)
      {
        inimage=false;
        rc.Width=_img.Width-rc.X;
        rgn.Union(rc);  
      }
    }
    return rgn;
  }
    public ShapedForm(Bitmap background, Color transparentColor)
    {
        this.FormBorderStyle = FormBorderStyle.None;
        this.BackgroundImage = background;
        this.Region = this.GetRegion(background, transparentColor);
    }
}