C# 播放器 调用winmm.dll获取歌曲的进度怎么程序就死了呢？在win7 64位上就可以 ，但在win7 32 位操作系统上就死了？？？

Question

一下是部分代码，我在主窗体的一个线程中调用获取进度并显示到进度条中：
 [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]
        private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);
        [DllImport("winmm.dll", EntryPoint = "mciGetDeviceID", CharSet = CharSet.Auto)]
        private static extern int mciGetDeviceID(string lpstrName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetShortPathName(string lpszLongPath, string shortFile, int cchBuffer);
        private static Cplayer player;
        private int baseVolumn;
        private int trebleVolum;
        private int leftVolum;
        private int rightVolum;
        private int masterVolum;
        private int iPos;
        private int duration;
        private int currentPosition;
        bool Flags = false;             //当前时间
        public int CurrentPosition
        {
            get
            {
                int i = 255;
                string stringBuilder = "";
                mciSendString("status MediaFile position", stringBuilder, i, 0);
                return (int)(Convert.ToDouble(stringBuilder.ToString()) / 1000f); ;
            }
        }

Answer 1

/// <summary>
        /// 当前时间
        /// </summary>
        public int CurrentPosition
        {
            get
            {
                try
                {
                    durLength = "";
                    durLength = durLength.PadLeft(128, Convert.ToChar(" "));
                    Win32.mciSendString("status media position", durLength, durLength.Length, 0);
                    durLength = durLength.Trim();
                    if (durLength == "") return 0;
                    mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f);
                    return mc.iPos;
                }
                catch { return 0; }
            }
        }
 /// <summary>
        /// 定位播放
        /// </summary>
        /// <param name="Position"></param>
        /// <returns></returns>
        public void SetMusicPos(bool isplay, int Position)
        {
            if (isplay)
            {
                string MciCommand = string.Format("play media from {0}", Position * 1000);
                int RefInt = Win32.mciSendString(MciCommand, null, 0, 0);
            }
            else
            {
                string MciCommand = string.Format("seek  media to {0}", Position * 1000);
                int RefInt = Win32.mciSendString(MciCommand, null, 0, 0);
            }
        } public class Win32
    {
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetShortPathName(
        string lpszLongPath,
        string shortFile,
        Int32 cchBuffer
        );        [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]
        public static extern int mciSendString(
        string lpstrCommand,
        string lpstrReturnString,
        int uReturnLength,
        int hwndCallback
        );    }
再试试