zoom+graphics+bitmap using CE;

[alarock]

HI
THIS IS MY CODE..I WANT TO ZOOM THE BITMAP..HOW IT IS POSSIBLE???

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

namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Bitmap bmp;
private Graphics grfx;
public Form1()
{
bmp=new Bitmap(this.Width,this.Height);
grfx=Graphics.FormImage(bmp);
grfx.PageUnit=GraphicsUnit.Millimeter;
this.Autoscrollminsize=bmp.Size;
InitializeComponent();
}
protected override void OnMouseClick(MouseEventArgs e)
{
grfx.DrawRectangle(new Pen(color.Red),2,2,30,50);
base.OnMouseClick(e);
}

protected override void OnMouseWheel(MouseEventArgs e)
{

/// here i want to perform the zoom operation of the bitmap (or) grfx...
base.OnMouseWheel(e);
}
protected override void OnPaint(PaintEventArgs pe)
{
Graphics Grfxbmp=pe.graphics;
Grfxbmp.DrawBitmap(bmp,this.AutoscrolPosition.x,Au toscrolPoisition.y,bmp.width,bmp.height);
base.OnPaint(e);
}


}
}


Thanks And regards,
ALGATES....