wince定时拍照功能

转自：http://blog.csdn.net/xyz_lmn/archive/2010/02/26/5329308.aspx 

 

  CameraCaptureDialog 后必须手动按“确定”然后“退出”，才能拍照， 怎样使用 CameraCaptureDialog 实现自动、定时拍照呢？可以使用System.Windows.Forms.Timer 、SendMessage方法实现，Timer方法必须在主线程中。

实现代码：

 public partial class Form1 : Form
    {
        /*
        [DllImport("CoreDll")]
        public static extern IntPtr FindWindow(
                          string lpClassName,  // class name
                          string lpWindowName  // window name
                          );
        */
        [DllImport("CoreDll")]
        public static extern IntPtr SendMessage(
              IntPtr hWnd,      // handle to destination window
              uint Msg,     // message
              uint wParam,  // first message parameter
              uint lParam   // second message parameter
              );

        [DllImport("CoreDll")]
        public static extern IntPtr GetForegroundWindow();

        System.Threading.Timer tmr;

        public Form1()
        {
            InitializeComponent();

        }

        private void menuItem2_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void menuItem1_Click(object sender, EventArgs e)
        {

            CameraCaptureDialog ccd = new CameraCaptureDialog();
            ccd.Mode = CameraCaptureMode.Still;

            object someState = new object();
            TimerCallback tmrClbck = new TimerCallback(this.atTimer1);
            tmr = new System.Threading.Timer(tmrClbck, someState, 10* 1000, -1);
            
            if (ccd.ShowDialog() == DialogResult.OK)
            {
                pictureBox1.Image = new Bitmap(ccd.FileName);
                //MessageBox.Show("OK");
            }
        }

        private void atTimer1(object state)
        {
            Debug.WriteLine("Timer 1 On");
            IntPtr hwnd = GetForegroundWindow();
            SendMessage(hwnd, 0x100, 0x0d, 0xf20001);

            object someState = new object();
            TimerCallback tmrClbck = new TimerCallback(this.atTimer2);
            tmr = new System.Threading.Timer(tmrClbck, someState, 2 * 1000, -1);
            //tmr.Dispose();
        }

        private void atTimer2(object state)
        {
            Debug.WriteLine("Timer 2 On");
            IntPtr hwnd = GetForegroundWindow();
            SendMessage(hwnd, 0x101, 0x1b, 0xc0310001);
            tmr.Dispose();
        }
    }

程序中发送的 message，不同的 device 不同，需要用 Remote Spy 去抓

http://hi.baidu.com/%D0%CF%BD%F2%C8%F0/blog/item/33f8c9170bea01064a90a712.html

参考：

http://hi.baidu.com/%D0%CF%BD%F2%C8%F0/blog/item/793132ddef3f28e876c6385f.html/cmtid/6b2f0307824e84c17b8947a2

http://www.christec.co.nz/blog/archives/208