教你使用C# 截取屏幕图像,都来做自己的屏幕录像专家

//获取屏幕1024*768图像
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern int BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, UInt32 dwRop);
      //创建桌面句柄
        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, int lpInitData);
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hdc);
        //转换为本地的图像资源
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight);
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern int DeleteDC(IntPtr hdc);
        //释放用过的设备句柄
        [DllImport("user32.dll")]
        public static extern bool ReleaseDC(
         IntPtr hwnd, IntPtr hdc
         );
        //释放用过的画笔等资源
        [DllImport("gdi32.dll")]
        public static extern bool DeleteObject(
          IntPtr hdc
         );
        

/// <summary>
        /// 截取屏幕图像
        /// </summary>
        /// <param name="Width">宽</param>
        /// <param name="Height">高</param>
        /// <param name="x">x坐标(全屏时候为0)</param>
        /// <param name="y">y坐标(全屏时候为0)</param>

        /// <returns></returns>
        public Bitmap fullphoto(int Width,int Height,int x,int y)
        {
            Bitmap bitmap;
            //try
            //{
                IntPtr hScreenDc = CreateDC("DISPLAY", null, null, 0); // 创建桌面句柄
                IntPtr hMemDc = CreateCompatibleDC(hScreenDc); // 创建与桌面句柄相关连的内存DC
                IntPtr hBitmap = CreateCompatibleBitmap(hScreenDc, Width, Height);   
                IntPtr hOldBitmap = SelectObject(hMemDc, hBitmap);
                BitBlt(hMemDc, x, y, Width, Height, hScreenDc, x, y, (UInt32)0xcc0020);
                IntPtr map = SelectObject(hMemDc, hOldBitmap);
                bitmap = Bitmap.FromHbitmap(map);  
                ReleaseDC(hBitmap, hScreenDc);
                DeleteDC(hScreenDc);//删除用过的对象
                DeleteDC(hMemDc);//删除用过的对象
                DeleteDC(hOldBitmap);
                DeleteObject(hBitmap);
               
              
            //}
            //catch (Exception wx)
            //{
            //    return null;
                //}
                // number= number +1;
                // bitmap.Save("screen" + number + ".bmp");
            
            return bitmap;
        }

屏幕截图大概就是这样的,
用
bitmap.Save保存一下,看看是不是屏幕的图像,呵呵.
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ok

哪如何把这些图片组合生成动画世界或视频文件

呵呵,那你要先研究了

楼主是想每秒截取屏幕30副图片，然后组成一个视频文件？？？

秒截取屏幕图片,可以自己社定，组成一个视频文件，我还没有研究，估计需要GDI的API

感觉这样的话，效率不是 很好吧。。

需要用到DX吧，或VFW。。这样搞成的AVI容量太大，受不了的.要是能录SWF那是理想选择.

这样录下来你保存为AVI后，一分钟就有1G多。

标准BMP.一张1024*768＝2.25M*(1秒＝30)
2.25*30*60＝？4050！

jacklee算得仔细