Graphics.CopyFromScreen Method (Int32, Int32, Int32, Int32, Size)

 
System_CAPS_noteNote

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Performs a bit-block transfer of the color data, corresponding to a rectangle of pixels, from the screen to the drawing surface of the Graphics.

Namespace:   System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

public void CopyFromScreen(
	int sourceX,
	int sourceY,
	int destinationX,
	int destinationY,
	Size blockRegionSize
)

Parameters

sourceX
Type: System.Int32

The x-coordinate of the point at the upper-left corner of the source rectangle.

sourceY
Type: System.Int32

The y-coordinate of the point at the upper-left corner of the source rectangle.

destinationX
Type: System.Int32

The x-coordinate of the point at the upper-left corner of the destination rectangle.

destinationY
Type: System.Int32

The y-coordinate of the point at the upper-left corner of the destination rectangle.

blockRegionSize
Type: System.Drawing.Size

The size of the area to be transferred.

Exception Condition
Win32Exception

The operation failed.

The CopyFromScreen methods are useful for layering one image on top of another. To specify how the source and destination colors are blended, use one of the CopyFromScreen methods that takes a CopyPixelOperation parameter.

The following code example demonstrates how to use the CopyFromScreen for printing a copy of the current form.


using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Printing;

public class Form1 :
    Form
{
    private Button printButton = new Button();
    private PrintDocument printDocument1 = new PrintDocument();

    public Form1()
    {
        printButton.Text = "Print Form";
        printButton.Click += new EventHandler(printButton_Click);
        printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);
        this.Controls.Add(printButton);
    }

    void printButton_Click(object sender, EventArgs e)
    {
        CaptureScreen();
        printDocument1.Print();
    }


    Bitmap memoryImage;

    private void CaptureScreen()
    {
        Graphics myGraphics = this.CreateGraphics();
        Size s = this.Size;
        memoryImage = new Bitmap(s.Width, s.Height, myGraphics);
        Graphics memoryGraphics = Graphics.FromImage(memoryImage);
        memoryGraphics.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s);
    }

    private void printDocument1_PrintPage(System.Object sender,  
           System.Drawing.Printing.PrintPageEventArgs e)
    {
        e.Graphics.DrawImage(memoryImage, 0, 0);
    }



    public static void Main()
    {
        Application.Run(new Form1());
    }
}

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.NET Framework
Available since 2.0
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