C# WinForm

WinForm

隐藏任务栏

this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;

Win API

获取当前截图

//首先导入库文件
        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]

        //声明函数
        private static extern IntPtr CreateDC
        (
            string Driver,   //驱动名称
            string Device,   //设备名称
            string Output,   //无用，可以设定为null
            IntPtr PrintData //任意的打印机数据
         );


        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        private static extern bool BitBlt(
            IntPtr hdcDest,     //目标设备的句柄
            int XDest,          //目标对象的左上角X坐标
            int YDest,          //目标对象的左上角的Y坐标
            int Width,          //目标对象的宽度
            int Height,         //目标对象的高度
            IntPtr hdcScr,      //源设备的句柄
            int XScr,           //源设备的左上角X坐标
            int YScr,           //源设备的左上角Y坐标
            Int32 drRop         //光栅的操作值

            );

        public Image getScreenShot() {
            //this.Hide();
            IntPtr dc1 = CreateDC("DISPLAY", null, null, (IntPtr)null);
            //创建显示器的DC
            Graphics g1 = Graphics.FromHdc(dc1);
            //由一个指定设备的句柄创建一个新的Graphics对象
            Bitmap MyImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, g1);
            //根据屏幕大小创建一个与之相同大小的Bitmap对象
            Graphics g2 = Graphics.FromImage(MyImage);
            //获得屏幕的句柄
            IntPtr dc3 = g1.GetHdc();
            //获得位图的句柄
            IntPtr dc2 = g2.GetHdc();
            //把当前屏幕捕获到位图对象中
            BitBlt(dc2, 0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, dc3, 0, 0, 13369376);
            //把当前屏幕拷贝到位图中
            g1.ReleaseHdc(dc3);
            //释放屏幕句柄
            g2.ReleaseHdc(dc2);
            //释放位图句柄
            return MyImage;
        }