向zwz版主请教，有关数畅问题无法在wndproc中取得自定义消息的问题

我的代码如下，调用SCStock_Init方法后，重写windows窗体的WndProc方法后，始终无法截获自定义的消息，debug许久，不明所以。无奈下，向zwz及坛内各位求救，感激不尽！
此程序执行时，可以成功启动数畅接口，数畅也能显示分析软件是我的程序，但是消息处理时，始终截获不到!!

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace SCTest
{
    /// <summary>
    /// 引擎初始化包        // 发出初始化请求，调用SCInit时使用，无对应返回包
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_InitAsk
    {
        public SCHead m_Head;
        public UInt32 m_dwSoftware;         // 分析软件标识，由数畅分配
        public IntPtr m_hWnd;               // 用来接收数据的窗口句柄
        public UInt32 m_nMsg;               // 用来接收数据的消息
    }

    /// <summary>
    /// 请求包头
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SCHead
    {
        public UInt16 m_nType;          // 请求/应答类型，SC_MARKET、SC_IMCONTENT等
        public char m_cStatus;          // 当为应答包时，m_cStatus=1成功，m_cStatus=0失败，m_cStatus=2离线
        /// <summary>
        /// 包的唯一索引。不要设为0，请求的时候赋值，并在应答包中
        /// 判断是否与请求包中的相同，如果不同，则表示不是这个请求包对应的应答包
        /// 如果这个值为0，表示不是请求引起的数据变化
        /// </summary>
        public Int32 m_lIndex;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct StockInfo
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
        public char[] m_szLabel;	                            // 股票代码,以'\0'结尾
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
        public char[] m_szName;	                                // 股票名称,以'\0'结尾
        public Int16 m_nHand;                                   // 每手股数
    }

    /// <summary>
    /// 市场内容
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SCMarket
    {
        public UInt16 m_wMarket;                                //市场代码
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public char[] m_Name;	                                // 市场名称
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public char[] m_CShortName;	                            // 中文简称
        public UInt32 m_lProperty;                              //市场属性（未定义）
        public UInt32 m_lDate;                              //数据日期（20030114）
        public UInt16 m_PeriodCount;                            //交易时段个数
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public UInt16[] m_OpenTime;                               //开市时间 1,2,3,4,5
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public UInt16[] m_CloseTime;                              //收市时间 1,2,3,4,5
        public UInt16 m_nCount;                                 //收市时间 1,2,3,4,5
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
        public StockInfo[] m_Siif;
    }

    /// <summary>
    /// //证券标识
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct StockID
    {
        public UInt16 m_wMarket;            //市场代码
        public Int16 m_nIndex;              //在该市场SCMarket::m_Siff中的偏移
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct RCV_NOW_STRUCTEx
    {
        public StockID m_sID;
        public Int32 m_time;

        public float m_fLastClose;					// 昨收
        public float m_fOpen;						// 今开
        public float m_fHigh;						// 最高
        public float m_fLow;						// 最低
        public float m_fNewPrice;					// 最新
        public float m_fVolume;						// 成交量
        public float m_fAmount;						// 成交额

        Int32 m_lStroke;						    // 本次实际成交笔数
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fBuyPrice;					// 申买价1,2,3,4,5
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fBuyVolume;				// 申买量1,2,3,4,5
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fSellPrice;				// 申卖价1,2,3,4,5
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fSellVolume;				// 申卖量1,2,3,4,5
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct RCV_PANKOU_STRUCTEx
    {
        public Int32 m_time;                        // UCT

        public float m_fHigh;						// 最高
        public float m_fLow;						// 最低
        public float m_fNewPrice;					// 最新
        public float m_fVolume;						// 成交量
        public float m_fAmount;						// 成交额

        public Int32 m_lStroke;						// 本次实际成交笔数
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fBuyPrice;					// 申买价1,2,3
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fBuyVolume;				// 申买量1,2,3，
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fSellPrice;				// 申卖价1,2,3
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public float[] m_fSellVolume;				// 申卖量1,2,3
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct RCV_HISTORY_STRUCTEx
    {
        public Int32 m_time;                // UCT

        public float m_fOpen;			    //开盘
        public float m_fHigh;			    //最高
        public float m_fLow;				//最低
        public float m_fClose;			    //收盘
        public float m_fVolume;			    //量
        public float m_fAmount;			    //额
        public UInt16 m_wAdvance;			//涨数,仅大盘有效
        public UInt16 m_wDecline;			//跌数,仅大盘有效
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct RCV_POWER_STRUCTEx
    {
        public Int32 m_time;	 // UCT
        public float m_fGive;	 // 每股送
        public float m_fPei;	 // 每股配
        public float m_fPeiPrice;	 // 配股价,仅当 m_fPei!=0.0f 时有效
        public float m_fProfit;	 // 每股红利
    }

    /// <summary>
    /// 请求包和应答包  // 这个包无需请求即可收到，在市场信息变化的时候就可收到
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_MarketReply
    {
        public SCHead m_Head;
        public SCMarket m_Market;
    }

    /// <summary>
    /// // 这个包无需请求即可收到。数据有更新，会自动发送
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_NowDataReply
    {
        public SCHead m_Head;
        public Int16 m_nCount;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
        public RCV_NOW_STRUCTEx[] m_Now;
    }

    /// <summary>
    /// 请求一天盘口数据，现支持当天，历史盘口将通过下载获得
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_PankouAsk
    {
        public SCHead m_Head;
        public StockID m_sID;
        public Int32 m_lDate;               // FORMAT: 20010305
    }

    /// <summary>
    /// 请求一天盘口数据，现支持当天，历史盘口将通过下载获得
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_PankouReply
    {
        public SCHead m_Head;
        public StockID m_sID;
        public Int32 m_lDate;			// FORMAT: 20010305
        public float m_fLastClose;			// 昨收
        public float m_fOpen;			// 今开
        public Int32 m_lCount;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
        public RCV_PANKOU_STRUCTEx[] m_Data;

    }


    // 注意：
    // 1、由于服务器的设置，可能只能收到最近某一时段的数据，更多的数据，可以通过下载获得。
    // 2、对于K线请求包，当表示日线时，long的格式为yyyymmdd，
    // 3、对于K线请求包，当为五分钟线时，long的格式如下面这个TDate结构所示
    //	struct TDate {		// 五分钟时间格式
    //		unsigned long m_Minute : 6;
    //		unsigned long m_Hour : 5;
    //		unsigned long m_Day  : 5;
    //		unsigned long m_Month : 4; 
    //		unsigned long m_Year : 12;
    //	};
    // 4、关于时间的转行，我们提供例子中有示范代码，可参考。
    // 5、对K线应答包，日线和无分钟的时间统一为time_t格式，已经包含日期和分钟信息。

    /// <summary>
    /// 
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_KLineAsk
    {
        public SCHead m_Head;
        public StockID m_sID;
        public UInt16 m_wDataType;		// KLINE_DAYDATA or KLINE_MIN5DATA
        public Int32 m_tBegin;			// 开始时间或位置，0表示从第一个数据开始
        public Int32 m_tEnd;			// 结束时间或请求数量，0表示直到结束

    }

    [StructLayout(LayoutKind.Sequential)]
    public struct SC_KLineReply
    {
        public SCHead m_Head;
        public StockID m_sID;
        public UInt16 m_wDataType;		// KLINE_DAYDATA or KLINE_MIN5DATA
        public Int32 m_lDataCount;			// m_pData数量
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
        public RCV_HISTORY_STRUCTEx[] m_pData;
    }

    /// <summary>
    /// 除权数据不校验，总是以服务器的为准
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SC_CQAsk
    {
        public SCHead m_Head;
        public StockID m_sID;
    }

    public struct SC_CQReply
    {
        public SCHead m_Head;
        public StockID m_sID;
        public Int16 m_nCount;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
        public RCV_POWER_STRUCTEx[] m_pData;// m_head不使用
    }

    public unsafe class SCStock
    {
        public const int STKLABEL_LEN = 10;	// 股号数据长度,国内市场股号编码兼容钱龙
        public const int STKNAME_LEN = 32;	// 股名长度
        public const int TITLE_LEN = 64;		// 信息地雷标题长度

        public const int SC_INIT = 0x2001;	// SCInit调用

        public const int SC_CLEAR_PREVREQ = 0x2101;	// 撤销前面的所有请求，建议在发请求（或组合请求）之前调用
        public const int SC_MARKET = 0x2131;	// 请求指定市场的信息，无需请求，有变化就会自动发送

        public const int SC_NOWDATA = 0x2201;

        public const int SC_PANKOU = 0x2301;	// 请求盘口数据，对应：time_t m_time，建议使用这个。

        public const int SC_IMTYPELIST = 0x2401;	// 请求信息地雷信息分类表
        public const int SC_IMTITLE = 0x2402;	// 请求信息地雷标题列表
        public const int SC_IMCONTENT = 0x2403;	// 请求信息地雷数据(f10, 交易所公告、实时和历史的个股信息等)

        public const int SC_KLINE = 0x2501;	// 请求K线数据（日线）

        public const int SC_CQ = 0x2601;	// 请求除权数据

        public const int SC_DL_KLINE = 0x2701;	// K线数据下载
        public const int SC_DL_CQ = 0x2702;	// 除权数据下载
        public const int SC_DL_XX = 0x2703;	// 信息下载，如F10、交易所公告、新闻等
        public const int SC_DL_TRACE = 0x2704;	// 明细数据，旧的，新版已不用
        public const int SC_DL_5MIN = 0x2705;	// 5分钟K线下载

        //define for SC_KLineAsk::m_wDataType
        public const UInt16 KLINE_DAYDATA = 0;//日线
        public const UInt16 KLINE_MIN5DATA = 1;	//5分钟线

        [DllImport(@"C:\数畅信息服务平台\SCStock.dll")]
        private static extern bool SCInit(void* sca, Int32 nsize);

        [DllImport(@"C:\数畅信息服务平台\SCStock.dll")]
        private static extern bool SCAskData(void* pAsk, Int32 nsize);

        [DllImport(@"C:\数畅信息服务平台\SCStock.dll")]
        private static extern void SCQuit();

        public static bool SCStock_Init(IntPtr hwnd, UInt32 nMsg)
        {
            SC_InitAsk sca; //= new SC_InitAsk();
            sca.m_dwSoftware = 0x567890;
            sca.m_Head.m_nType = SCStock.SC_INIT;
            sca.m_Head.m_cStatus = Convert.ToChar(1);
            sca.m_nMsg = nMsg;
            sca.m_hWnd = hwnd;
            return SCStock.SCInit(&sca, Marshal.SizeOf(sca));
        }

        public static void SCStock_Quit()
        {
            SCQuit();
        }

    }

}

窗体程序如下：

Code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace SCTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private UInt32 My_Msg_StkData;

        private void button1_Click(object sender, EventArgs e)
        {
            SCStock.SCStock_Init(this.Handle, My_Msg_StkData);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
        }

        private void button2_Click(object sender, EventArgs e)
        {
            SCStock.SCStock_Quit();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            My_Msg_StkData =Win32API.RegisterWindowMessage("BobStockDEMO");
        }

        private void button3_Click(object sender, EventArgs e)
        {
            SCStock.SCStock_AskPower();
        }

        SCMarket MKTDATA;
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == My_Msg_StkData)
            {
                //此处始终不能执行
                SCHead pHead = (SCHead)m.GetLParam(typeof(SCHead));
                switch (pHead.m_nType)
                {
                    case SCStock.SC_MARKET:
                        break;
                    case SCStock.SC_NOWDATA:
                        break;
                    case SCStock.SC_KLINE:
                        break;
                    case SCStock.SC_PANKOU:
                        break;
                    case SCStock.SC_CQ:
                        break;
                    case SCStock.SC_IMTYPELIST:
                        break;
                    case SCStock.SC_IMTITLE:
                        break;
                    case SCStock.SC_IMCONTENT:
                        break;
                    case SCStock.SC_DL_KLINE:		// 日k线下载
                        break;
                    case SCStock.SC_DL_5MIN:		// 五分钟k线下载
                        break;
                    case SCStock.SC_DL_CQ:			// 除权数据下载
                        break;
                    case SCStock.SC_DL_XX:			// 资讯数据下载：交易所公告、信息地雷、新闻、综合等
                        break;
                    case SCStock.SC_DL_TRACE:
                        break;
                    default:
                        break;
                }
            }
        }
    }
}