跪求 c# wince停的截屏源代码

跪求 c# wince下的截屏源代码？
c# 创建一个基于wince的窗体，实现截取当前wince设备屏幕的功能，我是一个初学者还请c#牛人多多帮助！
[解决办法]
获取屏幕的图片

Image screenImg = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
using (Graphics g = Graphics.FromImage(screenImg))
{
    g.CopyFromScreen(0, 0, 0, 0, Screen.PrimaryScreen.Bounds.Size);
}

using System.Runtime.InteropServices;
using DWORD = System.UInt32;
using HANDLE = System.IntPtr;
using HDC = System.IntPtr;
[DllImport("coredll.dll")]
        public static extern bool BitBlt(
            IntPtr hdcDest,
            int nXDest,
            int nYDest,
            int nWidth,
            int nHeight,
            IntPtr hdcSrc,
            int nXSrc,
            int nYSrc,
            System.Int32 dwRop);
public static void PickPho()
        {
            //IntPtr dc1 = API.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(800, 480); 
 

            //Bitmap My=new Bitmap(

            //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, 800, 480, 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   
            int i = 0;
            try
            {
                while (File.Exists(@"D/" + i.ToString() + ".bmp"))
                {
                    i++;
                }
                MyImage.Save(@"D/" + i.ToString() + ".bmp", System.Drawing.Imaging.ImageFormat.Bmp);
            }
            catch
            { }
        }