[CF.Skills]Windows Mobile如何編程實現免提功能

摘要:本文闡述了如何在Windows mobile的裝置上使用Managed 程式碼在來電時觸發擴音器，間接實現免提的功能
Keywords
Windows Mobile,.NET CompactFramework,Speaker,keybd_event,C#

相關文章
http://www.cnblogs.com/fox23/archive/2008/02/15/phoneincoming.html
http://www.cnblogs.com/fox23/archive/2008/03/12/phonestate1.html

前提
你的WM裝置必須支援擴音器，模擬器自然不行

首先，需要匯入用於發送按鍵訊息的本地函數    class NativeHelper
    {
        private const int KEYEVENTF_KEYUP = 0x0002;
        [DllImport("coredll.dll")]
        private static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);
        /**//// <summary>
        /// 類比按鍵觸發擴音器
        /// </summary>
        public static void TriggleSpeaker()
        {
            keybd_event((byte)Keys.F16, 0, 0, 0);
            Thread.Sleep(500);
            keybd_event((byte)Keys.F16, 0, KEYEVENTF_KEYUP, 0);
        }
        /**//// <summary>
        /// 類比按鍵接電話
        /// </summary>
        public static void AcceptCall()
        {
            keybd_event((byte)Keys.F3, 0, 0, 0);
            Thread.Sleep(500);
            keybd_event((byte)Keys.F3, 0, KEYEVENTF_KEYUP, 0);
        }
    }

調用的時候：            SystemState phonestate = new SystemState(SystemProperty.PhoneIncomingCall);
            phonestate.Changed += new ChangeEventHandler(phonestate_Changed);


        void phonestate_Changed(object sender, ChangeEventArgs args)
        {
            NativeHelper.AcceptCall();
            NativeHelper.TriggleSpeaker();
        }

論壇上也有相關問題，歡迎來做進一步的討論：
http://forums.microsoft.com/china/ShowPost.aspx?PostID=3210021&SiteID=15
http://www.winbile.net/bbs/forums/threads/1036681.aspx

Enjoy it!

Freesc Huang
  黃季冬<fox23>@HUST
  2008.04.27