#region  第一種方法    
   [DllImport("user32.dll")]
        static extern bool GetCursorInfo(out CURSORINFO pci);

        private const Int32 CURSOR_SHOWING = 0x00000001;
         [StructLayout(LayoutKind.Sequential)]
        struct POINT
        {
            public Int32 x;
            public Int32 y;
        }

        [StructLayout(LayoutKind.Sequential)]
        struct CURSORINFO
        {
            public Int32 cbSize;    
            public Int32 flags;     
            public IntPtr hCursor;     
            public POINT ptScreenPos;   
        }
        public Image GetScreenImage()
        {
            Image myimage = new Bitmap(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);
            Graphics g = Graphics.FromImage(myimage);
            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height));

            //先截屏後，然後找到鼠標的位置，後將鼠標畫上去
            CURSORINFO pci;
            pci.cbSize = Marshal.SizeOf(typeof(CURSORINFO));
            GetCursorInfo(out pci);
            System.Windows.Forms.Cursor cur = new System.Windows.Forms.Cursor(pci.hCursor);
            cur.Draw(g, new Rectangle(pci.ptScreenPos.x - 10, pci.ptScreenPos.y - 10, cur.Size.Width, cur.Size.Height));
            return myimage;
        }

#endregion



#region 使用在顯存中獲取

   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
                    Bitmap 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);
                 

                    //CURSORINFO pci;
                    //pci.cbSize = Marshal.SizeOf(typeof(CURSORINFO));
                    //GetCursorInfo(out pci);
                    //System.Windows.Forms.Cursor cur = new System.Windows.Forms.Cursor(pci.hCursor);
                    //cur.Draw(g2, new Rectangle(pci.ptScreenPos.x - 10, pci.ptScreenPos.y - 10, cur.Size.Width, cur.Size.Height));

                    //把當前屏幕拷貝到位圖中
                    g1.ReleaseHdc(dc3);
                    //釋放屏幕句柄
                    g2.ReleaseHdc(dc2);
#endregion

不過做成windows服務中獲取到屏幕的截圖，先這樣，等研究出來再說

 

C# 桌面截屏 添加鼠標