c#.net print form not working properly

Hey i have used Print Document itself and the link which you have provided, in that i have some problem like i need to specify the path but i don't want that i want to print the active form. Here is my code used for print:
protected override void OnPaint(PaintEventArgs e)
{
DrawIt(e.Graphics);
}
private Bitmap _memoryImage;

private void DrawIt(Graphics G)
{
PrintDocument document = new PrintDocument();
document.PrintPage += new PrintPageEventHandler(printDocument2_PrintPage);
using (var myGraphics = CreateGraphics())
{
var s = Size;
_memoryImage = new Bitmap(2000, 1000, myGraphics);
using (var memoryGraphics = Graphics.FromImage(_memoryImage))
{
printDocument1.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("PaperA4", 950, 1250);
memoryGraphics.CopyFromScreen(Location.X, Location.Y, 70, 30, s);
}
}
}

private void printDocument2_PrintPage(object sender, PrintPageEventArgs e)
{
// calculate width and height scalings taking page margins into account
var wScale = e.MarginBounds.Width / (float)_memoryImage.Width;
var hScale = e.MarginBounds.Height / (float)_memoryImage.Height;

// choose the smaller of the two scales
var scale = wScale < hScale ? wScale : hScale;

// apply scaling to the image
e.Graphics.ScaleTransform(scale, scale);

// print to default printer's page
e.Graphics.DrawImage(_memoryImage, 70, 30);
printDocument1.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("PaperA4", 950, 1250);
}


private void pd_Print(object sender, PrintPageEventArgs e)
{
DrawIt(e.Graphics);
}
private void mnu_Click(object sender, EventArgs e)
{
Ps.ShowDialog();
Pd.DefaultPageSettings = Ps.PageSettings;
Pd.PrinterSettings = Ps.PrinterSettings;
}

private System.Drawing.Printing.PrintDocument document =
new System.Drawing.Printing.PrintDocument();



private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
// Create a new PrintPreviewDialog using constructor.
this.Pv = new PrintPreviewDialog();

//Set the size, location, and name.
this.Pv.ClientSize =
new System.Drawing.Size(400, 300);
this.Pv.Location =
new System.Drawing.Point(29, 29);
this.Pv.Name = "PrintPreviewDialog1";

// Associate the event-handling method with the
// document's PrintPage event.
this.document.PrintPage +=
new System.Drawing.Printing.PrintPageEventHandler
(printDocument2_PrintPage);

// Set the minimum size the dialog can be resized to.
this.Pv.MinimumSize =
new System.Drawing.Size(375, 250);



// Set the UseAntiAlias property to true, which will allow the
// operating system to smooth fonts.
this.Pv.UseAntiAlias = true;


Pv.Document = document;
Pv.ShowDialog();
//if (Pr.ShowDialog() == DialogResult.OK)
Pd.Print();
}

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{

}

please try to help me...