Graphics.CopyFromScreen Method (Int32, Int32, Int32, Int32, Size)
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.
Assembly: System.Drawing (in System.Drawing.dll)
Public Sub CopyFromScreen ( sourceX As Integer, sourceY As Integer, destinationX As Integer, destinationY As Integer, blockRegionSize As Size )
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.
Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Printing Public Class Form1 Inherits Form Private WithEvents printButton As New Button Private WithEvents printDocument1 As New PrintDocument Public Sub New() printButton.Text = "Print Form" Me.Controls.Add(printButton) End Sub Dim memoryImage As Bitmap Private Sub CaptureScreen() Dim myGraphics As Graphics = Me.CreateGraphics() Dim s As Size = Me.Size memoryImage = New Bitmap(s.Width, s.Height, myGraphics) Dim memoryGraphics As Graphics = Graphics.FromImage(memoryImage) memoryGraphics.CopyFromScreen(Me.Location.X, Me.Location.Y, 0, 0, s) End Sub Private Sub printDocument1_PrintPage(ByVal sender As System.Object, _ ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles _ printDocument1.PrintPage e.Graphics.DrawImage(memoryImage, 0, 0) End Sub Private Sub printButton_Click(ByVal sender As System.Object, ByVal e As _ System.EventArgs) Handles printButton.Click CaptureScreen() printDocument1.Print() End Sub Public Shared Sub Main() Application.Run(New Form1()) End Sub End Class
for access to all windows. Related enumeration: AllWindows.
Available since 2.0