一個抓取電腦屏幕的小控件臺程序
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;
using?System.Drawing;
using?System.Drawing.Imaging;

namespace?DeskRegistrar
{
????class?Program
????{
????????//聲明一個API函數
????????[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
????????private?static?extern?bool?BitBlt(
?????????????IntPtr?hdcDest,?//?目標?DC的句柄
?????????????int?nXDest,
?????????????int?nYDest,
?????????????int?nWidth,
?????????????int?nHeight,
?????????????IntPtr?hdcSrc,??//?源DC的句柄
?????????????int?nXSrc,
?????????????int?nYSrc,
?????????????System.Int32?dwRop??//?光柵的處理數值
?????????????);

????????[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
????????private?static?extern?IntPtr?CreateDC(
????????????string?lpszDriver,???//???驅動名稱???
????????????string?lpszDevice,???//???設備名稱???
????????????string?lpszOutput,???//???無用，可以設定位"NULL"???
????????????IntPtr?lpInitData????//???任意的打印機數據???
????????????);

????????static?void?Main(string[]?args)
????????{

????????????System.Threading.Timer?timer?=?new?System.Threading.Timer(delegate(Object?o)
????????????{
????????????????IntPtr?dc1?=?CreateDC("DISPLAY",?null,?null,?(IntPtr)null);
????????????????//創建顯示器的DC???
????????????????Graphics?g1?=?Graphics.FromHdc(dc1);
????????????????//由一個指定設備的句柄創建一個新的Graphics對象???
????????????????Image?MyImage?=?new?Bitmap(Screen.PrimaryScreen.Bounds.Width,?Screen.PrimaryScreen.Bounds.Height,?g1);
????????????????//根據屏幕大小創建一個與之相同大小的Bitmap對象???
????????????????Graphics?g2?=?Graphics.FromImage(MyImage);
????????????????//獲得屏幕的句柄???
????????????????IntPtr?dc3?=?g1.GetHdc();
????????????????//獲得位圖的句柄???
????????????????IntPtr?dc2?=?g2.GetHdc();
????????????????//把當前屏幕捕獲到位圖對象中???
????????????????BitBlt(dc2,?0,?0,?Screen.PrimaryScreen.Bounds.Width,?Screen.PrimaryScreen.Bounds.Height,?dc3,?0,?0,?13369376);
????????????????//把當前屏幕拷貝到位圖中???
????????????????g1.ReleaseHdc(dc3);
????????????????//釋放屏幕句柄???
????????????????g2.ReleaseHdc(dc2);
????????????????//釋放位圖句柄???
????????????????MyImage.Save(AppDomain.CurrentDomain.BaseDirectory?+?"\\"?+?DateTime.Now.ToString("yyyyMMddHHmmss")?+?".jpg",?ImageFormat.Jpeg);
????????????????//MessageBox.Show("已經把當前屏幕保存到C:\\MyJpeg.jpg文件中！");?
????????????},?null,?0,?3000);

????????????Console.Read();
????????}
????}
}

轉載于:https://www.cnblogs.com/gleamy_ming/archive/2009/03/20/1418067.html

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