java 实现截屏！

主要是利用java的几个先有的函数，如Robot这个类的一个方法createScreenCapture一个获得一个任意大小的屏幕图像（在这里是全屏图像），而所谓的截图就是在这个图像上画出一个矩形，再利用上面的方法获得这部分的图像，程序中的cf.setAlwaysOnTop(true)是必需的;看起来是在屏幕上截图，其实态枝和只是在一个在一个内镶有桌面背景的JFrame中截图。不知道还有没有其他的好方法~

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附上代码：

import java.awt.*;

import java.awt.image.*;

import java.awt.event.*;

import java.io.File;

import javax.imageio.ImageIO;

import javax.swing.*;

public class Camera {

/**

* @param args

*/

public static void main(String[] args) {

CameraJFrame cf=new CameraJFrame();

cf.setAlwaysOnTop(true);

cf.setUndecorated(true);

cf.setVisible(true);

}

}

class CameraJFrame extends JFrame

{

/**

*

*/搭段

private static final long serialVersionUID = 1L;

Dimension di=Toolkit.getDefaultToolkit().getScreenSize();

public CameraJFrame()

{

setSize(di);

getContentPane().add(new CameraJPanel());

}

class CameraJPanel extends JPanel implements MouseListener,MouseMotionListener

{

/**

* flag主要是用来判别状态。

* 文件的格式名帆盯是unname+数字编号，格式是png

*/

private static final long serialVersionUID = 1L;

BufferedImage bi,get;

int startx,starty,endx,endy;

int flag=1;

String filename="unname";

String fileformat="png";

int count=1;

public CameraJPanel()

{

try

{

Robot ro=new Robot();

bi=ro.createScreenCapture(new Rectangle(0,0,di.width,di.height));

}

catch(Exception e)

{

e.printStackTrace();

}

addMouseListener(this);

addMouseMotionListener(this);

}

public void paintComponent(Graphics g)

{

g.drawImage(bi,0,0,di.width,di.height,this);

g.setColor(Color.red);

g.drawRect(startx, starty, endx-startx, endy-starty);

}

public void mouseClicked(MouseEvent e) {

// TODO Auto-generated method stub

if(e.getButton()==MouseEvent.BUTTON3)

{

System.exit(0);

}

else if(e.getClickCount()==2)

{

try

{

Robot ro=new Robot();

get=ro.createScreenCapture(new Rectangle(startx,starty,endx-startx,endy-starty));

String name=filename+String.valueOf(count++)+"."+fileformat;

File f=new File(name);

ImageIO.write(get, fileformat, f);

}

catch(Exception ex)

{

ex.printStackTrace();

}

flag=1; //置flag为1，以便重新开始截图。

startx=starty=endx=endy=0;

repaint();

}

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {

if(flag==1)

{

startx=e.getX();

starty=e.getY();

}

}

public void mouseReleased(MouseEvent e) {

flag=0;

}

public void mouseDragged(MouseEvent e) {

flag=1;

endx=e.getX();

endy=e.getY();

repaint();

}

public void mouseMoved(MouseEvent e) {}

}

}

java 实现截图并且 保存在本地

import java.awt.AWTException;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseMotionAdapter;

import java.awt.image.BufferedImage;

import java.awt.image.RescaleOp;

import java.io.File;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.imageio.ImageIO;

import javax.swing.JFrame;

import javax.swing.filechooser.FileSystemView;

/**

* java截屏

* 运行誉稿后将当前屏幕截取，并最大化显示。

* 拖拽鼠标，选择自己需要的部分。

* 按Esc键保存图片到桌面，并退出程序。

* 点击右上角（没有可见的按钮），退出程序，不保存图片。扮毁

*

* @author JinCeon

*/

public class SnapshotTest {

public static void main(String[] args) {

// 全屏运行

RectD rd = new RectD();

GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment()

.getDefaultScreenDevice();

gd.setFullScreenWindow(rd);

}

}

class RectD extends JFrame {

private static final long serialVersionUID = 1L;

int orgx, orgy, endx, endy;

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

BufferedImage image;

BufferedImage tempImage;

BufferedImage saveImage;

Graphics g;

@Override

public void paint(Graphics g) {

RescaleOp ro = new RescaleOp(0.8f, 0, null);

tempImage = ro.filter(image, null);

g.drawImage(tempImage, 0, 0, this);

}

public RectD() {

snapshot();

setVisible(true);

// setSize(d);//庆缺孝最大化窗口

setDefaultCloseOperation(EXIT_ON_CLOSE);

this.addMouseListener(new MouseAdapter() {

public void mousePressed(MouseEvent e) {

orgx = e.getX();

orgy = e.getY();

}

});

this.addMouseMotionListener(new MouseMotionAdapter() {

public void mouseDragged(MouseEvent e) {

endx = e.getX();

endy = e.getY();

g = getGraphics();

g.drawImage(tempImage, 0, 0, RectD.this);

int x = Math.min(orgx, endx);

int y = Math.min(orgy, endy);

int width = Math.abs(endx - orgx)+1;

int height = Math.abs(endy - orgy)+1;

// 加上1，防止width或height为0

g.setColor(Color.BLUE);

g.drawRect(x-1, y-1, width+1, height+1);

//减1，加1都是为了防止图片将矩形框覆盖掉

saveImage = image.getSubimage(x, y, width, height);

g.drawImage(saveImage, x, y, RectD.this);

}

});

this.addKeyListener(new KeyAdapter() {

@Override

public void keyReleased(KeyEvent e) {

// 按Esc键退出

if (e.getKeyCode() == 27) {

saveToFile();

System.exit(0);

}

}

});

}

public void saveToFile() {

SimpleDateFormat sdf = new SimpleDateFormat("yyyymmddHHmmss");

String name = sdf.format(new Date());

File path = FileSystemView.getFileSystemView().getHomeDirectory();

String format = "jpg";

File f = new File(path + File.separator + name + "." + format);

try {

ImageIO.write(saveImage, format, f);

} catch (IOException e) {

e.printStackTrace();

}

}

public void snapshot() {

try {

Robot robot = new Robot();

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

image = robot.createScreenCapture(new Rectangle(0, 0, d.width,

d.height));

} catch (AWTException e) {

e.printStackTrace();

}

}

}

用JAVA怎么做截屏工具？

哎~要是你给我个分就好了!我穗散前几天刚刚做的!你拿去吧!

/*

作者:泡沫

地址:

功能:用于掘世截取图片,方判族肢便快捷!

mail:yuhuidog#163点抗 (注意:其中#为@)

*/

import java.awt.AWTException;

import java.awt.BorderLayout;

import java.awt.Button;

import java.awt.Color;

import java.awt.Cursor;

import java.awt.Dimension;

import java.awt.FileDialog;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Panel;

import java.awt.Point;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

public class AWTpicture extends Frame implements MouseListener,MouseMotionListener,ActionListener{

private int firstX,firstY,frameWidth,frameHeight;

private int firstWith,firstHeight,firstPointx,firstPointy;

private BufferedImage bi,sbi,original;

private Robot robot;

private Rectangle rectangle;

private Rectangle rectangleCursor,rectangleCursorUp,rectangleCursorDown,rectangleCursorLeft,rectangleCursorRight;

private Rectangle rectangleCursorRU,rectangleCursorRD,rectangleCursorLU,rectangleCursorLD;

private Image bis;

private Dimension dimension;

private Button button,button2,clearButton;

private Point[] point=new Point[3];

private int width,height;

private int nPoints=5;

private Panel panel;

private boolean drawHasFinish=false,change=false;

private int changeFirstPointX,changeFirstPointY,changeWidth,changeHeight;

private boolean changeUP=false,changeDOWN=false,changeLEFT=false,changeRIGHT=false,changeRU=false,changeRD=false,changeLU=false,changeLD=false;

private boolean clearPicture=false,redraw=false;

private FileDialog fileDialog;

private AWTpicture(){

//取得屏幕大小

dimension=Toolkit.getDefaultToolkit().getScreenSize();

frameWidth=dimension.width;

frameHeight=dimension.height;

fileDialog=new FileDialog(this,"泡沫截图",FileDialog.SAVE);

rectangle=new Rectangle(frameWidth,frameHeight);

panel=new Panel();

button=new Button("退出");

button.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));

button.setBackground(Color.green);

button2=new Button("截取");

button2.setBackground(Color.darkGray);

button2.addActionListener(new MyTakePicture(this));

button2.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));

button.addActionListener(this);

clearButton=new Button("重绘");

clearButton.setBackground(Color.green);

clearButton.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));

clearButton.addActionListener(new MyClearPicture(this));

panel.setLayout(new BorderLayout());

panel.add(clearButton, BorderLayout.SOUTH);

panel.add(button, BorderLayout.NORTH);

panel.add(button2, BorderLayout.CENTER);

try {

robot=new Robot();

} catch (AWTException e) {

e.printStackTrace();

}

//截取全屏

bi=robot.createScreenCapture(rectangle);

original=bi;

this.setSize(frameWidth,frameHeight);

this.setUndecorated(true);

this.addMouseListener(this);

this.addMouseMotionListener(this);

this.add(panel,BorderLayout.EAST);

this.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));

this.setVisible(true);

this.repaint();

}

public static void main(String[] args){

new AWTpicture();

}

public void paint(Graphics g) {

this.drawR(g);

}

//缓存图片

public void update(Graphics g){

if(bis==null){

bis=this.createImage(frameWidth, frameHeight);

}

Graphics ga=bis.getGraphics();

Color c=ga.getColor();

ga.setColor(Color.black);

ga.fillRect(0, 0, frameWidth, frameHeight);

ga.setColor(c);

paint(ga);

g.drawImage(bis, 0, 0, frameWidth, frameHeight, null);

}

public void mouseClicked(MouseEvent e) {

}

public void mouseEntered(MouseEvent e) {

// TODO Auto-generated method stub

}

public void mouseExited(MouseEvent e) {

// TODO Auto-generated method stub

}

public void mousePressed(MouseEvent e) {

// TODO Auto-generated method stub

}

public void mouseReleased(MouseEvent e) {

if(!drawHasFinish){

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[1].x;

firstPointy=point[1].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[2].x;

firstPointy=point[1].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[1].x;

firstPointy=point[2].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[2].x;

firstPointy=point[2].y;

}

changeFirstPointX=firstPointx;

changeFirstPointY=firstPointy;

if(point[1]!=null point[2]!=null ){

rectangleCursorUp=new Rectangle(firstPointx+20,firstPointy-10,width-40,20);

rectangleCursorDown=new Rectangle(firstPointx+20,firstPointy+height-10,width-40,20);

rectangleCursorLeft=new Rectangle(firstPointx-10,firstPointy+10,20,height-20);

rectangleCursorRight=new Rectangle(firstPointx+width-10,firstPointy+10,20,height-20);

rectangleCursorLU=new Rectangle(firstPointx-10,firstPointy-10,30,20);

rectangleCursorLD=new Rectangle(firstPointx-10,firstPointy+height-10,30,20);

rectangleCursorRU=new Rectangle(firstPointx+width-10,firstPointy-10,20,20);

rectangleCursorRD=new Rectangle(firstPointx+width-10,firstPointy+height-10,20,20);

drawHasFinish=true;

}

}

//确定每边能改变大小的矩形

if(drawHasFinish){

rectangleCursorUp=new Rectangle(changeFirstPointX+20,changeFirstPointY-10,changeWidth-40,20);

rectangleCursorDown=new Rectangle(changeFirstPointX+20,changeFirstPointY+changeHeight-10,changeWidth-40,20);

rectangleCursorLeft=new Rectangle(changeFirstPointX-10,changeFirstPointY+10,20,changeHeight-20);

rectangleCursorRight=new Rectangle(changeFirstPointX+changeWidth-10,changeFirstPointY+10,20,changeHeight-20);

rectangleCursorLU=new Rectangle(changeFirstPointX-2,changeFirstPointY-2,10,10);

rectangleCursorLD=new Rectangle(changeFirstPointX-2,changeFirstPointY+changeHeight-2,10,10);

rectangleCursorRU=new Rectangle(changeFirstPointX+changeWidth-2,changeFirstPointY-2,10,10);

rectangleCursorRD=new Rectangle(changeFirstPointX+changeWidth-2,changeFirstPointY+changeHeight-2,10,10);

}

}

public void mouseDragged(MouseEvent e) {

point[2]=e.getPoint();

//if(!drawHasFinish){

this.repaint();

// }

//托动鼠标移动大小

if(change){

if(changeUP){

changeHeight=changeHeight+changeFirstPointY-e.getPoint().y;

changeFirstPointY=e.getPoint().y;

}

if(changeDOWN){

changeHeight=e.getPoint().y-changeFirstPointY;

}

if(changeLEFT){

changeWidth=changeWidth+changeFirstPointX-e.getPoint().x;

changeFirstPointX=e.getPoint().x;

}

if(changeRIGHT){

changeWidth=e.getPoint().x-changeFirstPointX;

}

if(changeLU){

changeWidth=changeWidth+changeFirstPointX-e.getPoint().x;

changeHeight=changeHeight+changeFirstPointY-e.getPoint().y;

changeFirstPointX=e.getPoint().x;

changeFirstPointY=e.getPoint().y;

}

if(changeLD){

changeWidth=changeWidth+changeFirstPointX-e.getPoint().x;

changeHeight=e.getPoint().y-changeFirstPointY;

changeFirstPointX=e.getPoint().x;

}

if(changeRU){

changeWidth=e.getPoint().x-changeFirstPointX;

changeHeight=changeHeight+changeFirstPointY-e.getPoint().y;

changeFirstPointY=e.getPoint().y;

}

if(changeRD){

changeWidth=e.getPoint().x-changeFirstPointX;

changeHeight=e.getPoint().y-changeFirstPointY;

}

this.repaint();

}

}

public void mouseMoved(MouseEvent e) {

point[1]=e.getPoint();

//改变鼠标的形状

if(rectangleCursorUp!=null rectangleCursorUp.contains(point[1])){

this.setCursor(new Cursor(Cursor.N_RESIZE_CURSOR));

change=true;

changeUP=true;

}else if(rectangleCursorDown!=null rectangleCursorDown.contains(point[1])){

this.setCursor(new Cursor(Cursor.S_RESIZE_CURSOR));

change=true;

changeDOWN=true;

}else if(rectangleCursorLeft!=null rectangleCursorLeft.contains(point[1])){

this.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));

change=true;

changeLEFT=true;

}else if(rectangleCursorRight!=null rectangleCursorRight.contains(point[1]) ){

this.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));

change=true;

changeRIGHT=true;

}else if(rectangleCursorLU !=null rectangleCursorLU.contains(point[1])){

this.setCursor(new Cursor(Cursor.NW_RESIZE_CURSOR));

change=true;

changeLU=true;

}else if(rectangleCursorLD !=null rectangleCursorLD.contains(point[1])){

this.setCursor(new Cursor(Cursor.SW_RESIZE_CURSOR));

change=true;

changeLD=true;

}else if(rectangleCursorRU!=null rectangleCursorRU.contains(point[1])){

this.setCursor(new Cursor(Cursor.NE_RESIZE_CURSOR));

change=true;

changeRU=true;

}else if(rectangleCursorRD!=null rectangleCursorRD.contains(point[1])){

this.setCursor(new Cursor(Cursor.SE_RESIZE_CURSOR));

change=true;

changeRD=true;

}else{

this.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));

changeUP=false;changeDOWN=false;changeRIGHT=false;changeLEFT=false;changeRU=false;

changeRD=false;changeLU=false;changeLD=false;

}

redraw=false;

}

@Override

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

class MyTakePicture implements ActionListener{

AWTpicture aWTpicture;

MyTakePicture(AWTpicture aWTpicture){

this.aWTpicture=aWTpicture;

}

//保存图片

public void actionPerformed(ActionEvent e) {

fileDialog.setVisible(true);

if(changeWidth0){

sbi=bi.getSubimage(changeFirstPointX,changeFirstPointY,changeWidth,changeHeight);

File file=new File(fileDialog.getDirectory());

file.mkdir();

try {

ImageIO.write(sbi, "jpeg",new File(file,fileDialog.getFile()+".jpg") );

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

}

class MyClearPicture implements ActionListener{

AWTpicture aWTpicture;

MyClearPicture(AWTpicture aWTpicture){

this.aWTpicture=aWTpicture;

}

public void actionPerformed(ActionEvent e) {

drawHasFinish=false;

change=false;

redraw=true;

rectangleCursorUp=null;

rectangleCursorDown=null;

rectangleCursorLeft=null;

rectangleCursorRight=null;

rectangleCursorRU=null;

rectangleCursorRD=null;

rectangleCursorLU=null;

rectangleCursorLD=null;

changeWidth=0;

changeHeight=0;

aWTpicture.repaint();

}

}

public void drawR(Graphics g){

g.drawImage(bi, 0,0,frameWidth,frameHeight, null);

if(point[1]!=null point[2]!=null !drawHasFinish !redraw){

int[] xPoints={point[1].x,point[2].x,point[2].x,point[1].x,point[1].x};

int[] yPoints={point[1].y,point[1].y,point[2].y,point[2].y,point[1].y};

width=(point[2].x-point[1].x)0?(point[2].x-point[1].x):(point[1].x-point[2].x);

height=(point[2].y-point[1].y)0?(point[2].y-point[1].y):(point[1].y-point[2].y);

changeWidth=width;

changeHeight=height;

Color c=g.getColor();

g.setColor(Color.red);

g.drawString(width+"*"+height, point[1].x, point[1].y-5);

//画点

/*int i;

if()*/

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[1].x;

firstPointy=point[1].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[2].x;

firstPointy=point[1].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[1].x;

firstPointy=point[2].y;

}

if(point[1].xpoint[2].x point[1].ypoint[2].y){

firstPointx=point[2].x;

firstPointy=point[2].y;

}

g.fillRect(firstPointx-2,firstPointy-2 , 5,5);

g.fillRect(firstPointx+(width)/2,firstPointy-2 , 5,5);

g.fillRect(firstPointx+width-2,firstPointy-2 , 5,5);

g.fillRect(firstPointx+width-2,firstPointy+ height/2-2, 5,5);

g.fillRect(firstPointx+width-2,firstPointy+height-2, 5,5);

g.fillRect(firstPointx+(width)/2,firstPointy+height-2, 5,5);

g.fillRect(firstPointx-2,firstPointy+height-2, 5,5);

g.fillRect(firstPointx-2,firstPointy+ height/2-2, 5,5);

//画矩形

//g.drawString("fafda", point[1].x-100, point[1].y-5);

g.drawPolyline(xPoints, yPoints, nPoints);

}

if(change){

g.setColor(Color.red);

g.drawString(changeWidth+"*"+changeHeight, changeFirstPointX, changeFirstPointY-5);

g.fillRect(changeFirstPointX-2,changeFirstPointY-2 , 5,5);

g.fillRect(changeFirstPointX+(changeWidth)/2,changeFirstPointY-2 , 5,5);

g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY-2 , 5,5);

g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY+ changeHeight/2-2, 5,5);

g.fillRect(changeFirstPointX+changeWidth-2,changeFirstPointY+changeHeight-2, 5,5);

g.fillRect(changeFirstPointX+(changeWidth)/2,changeFirstPointY+changeHeight-2, 5,5);

g.fillRect(changeFirstPointX-2,changeFirstPointY+changeHeight-2, 5,5);

g.fillRect(changeFirstPointX-2,changeFirstPointY+ changeHeight/2-2, 5,5);

g.drawRect(changeFirstPointX, changeFirstPointY, changeWidth, changeHeight);

}

}

}

再C#中QQ截图的代码怎么写

QQ截图的核心其实就是调用WINDOWS API函数，主要涉及两个核心组件, user32.dll和gdi32.dll。

如下是，C#代码调用上述两个核心组件的完整示例：

namespace WindowsFormsApplication1

{

/// summary

/// 屏幕捕获类 

/// /summary

public class ScreenCapture

{

/// summary

/// 创建一个包含整个桌面的截图Image对象(捕获到的桌面是当前WINDOWS操作系统活动桌面)

/// /summary

/// returns/returns

public Image CaptureScreen()

{

return CaptureWindow(User32.GetDesktopWindow());

}

/// summary

/// 创建一个包含特定窗口的截图Image对象

改茄      /// /summary

/// param name="handle"启动本程序的句柄窗口(在Windows上这是由Handle属性获得）/param

/// returns/returns

public Image CaptureWindow(IntPtr handle)

{

// 获取目标窗口的HDC

IntPtr hdcSrc = User32.GetWindowDC(handle);

// 获取它的大小

User32.RECT windowRect = new User32.RECT();

User32.GetWindowRect(handle, ref windowRect);

int width = windowRect.right - windowRect.left;

int height = windowRect.bottom - windowRect.top;

// 创建设备上下文对象

IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);

橘歼迟  IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);

IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);

GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);

GDI32.SelectObject(hdcDest, hOld);

GDI32.DeleteDC(hdcDest);

User32.ReleaseDC(handle, hdcSrc);

圆李      Image img = Image.FromHbitmap(hBitmap);

GDI32.DeleteObject(hBitmap);

return img;

}

/// summary

/// 获取特定窗口，并保存它

/// /summary

/// param name="handle"/param

/// param name="filename"/param

/// param name="format"/param

public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format)

{

Image img = CaptureWindow(handle);

img.Save(filename, format);

}

/// summary

/// 捕获整个windows活动窗口并保存它

/// /summary

/// param name="filename"/param

/// param name="format"/param

public void CaptureScreenToFile(string filename, ImageFormat format)

{

Image img = CaptureScreen();

img.Save(filename, format);

}

/// summary

/// GDI32 相关的API函数

/// /summary

private class GDI32

{

public const int SRCCOPY = 0x00CC0020;  

[DllImport("gdi32.dll")]

public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest,

int nWidth, int nHeight, IntPtr hObjectSource,

int nXSrc, int nYSrc, int dwRop);

[DllImport("gdi32.dll")]

public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,

int nHeight);

[DllImport("gdi32.dll")]

public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

[DllImport("gdi32.dll")]

public static extern bool DeleteDC(IntPtr hDC);

[DllImport("gdi32.dll")]

public static extern bool DeleteObject(IntPtr hObject);

[DllImport("gdi32.dll")]

public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);

}

/// summary

/// User32 API相关函数

/// /summary

private class User32

{

[StructLayout(LayoutKind.Sequential)]

public struct RECT

{

public int left;

public int top;

public int right;

public int bottom;

}

[DllImport("user32.dll")]

public static extern IntPtr GetDesktopWindow();

[DllImport("user32.dll")]

public static extern IntPtr GetWindowDC(IntPtr hWnd);

[DllImport("user32.dll")]

public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);

[DllImport("user32.dll")]

public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);

}

}

}

//  调用示例：

private void button1_Click(object sender, EventArgs e)

{

ScreenCapture sc = new ScreenCapture();

// 捕获整个屏幕并保存到一个文件里

Image img = sc.CaptureScreen();

// 将捕获的图片显示在图片控件里

this.pictureBox1.Image = img;

// 捕获当前运行窗体并保存在C盘,文件名和后缀为temp.png

sc.CaptureWindowToFile(this.Handle, "C:\\temp.png", ImageFormat.Gif);

}

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