本文介绍C#视频监控系统服务器端的API封装方法，重点讲解了DS40xxSDK.dll中与板卡初始化、信息获取及编码卡操作相关的API函数。
C# 视频监控系列（7）：服务器端——封装API(下) [DS40xxSDK.dll] (上)。
前言
写系列文章的时候[前言]部分变得无言了，可能来得顺利了点吧: ) 本章中提供的封装均是我用笨办法从<<Hikvision 板卡网络开发包编程手册V4.7>>和<<DS-4000HC、HCS、HC+、HF、HS、MD卡的Windows编程指南V4.3>>中拷贝出来并参照VC++代码进行整理的，主要是针对HikServer.dll和DS40xxSDK.dll的调用封装。
正文
1. DS40xxSDK.dll
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;
namespace HikServer.DS40xxSDK
{
#region enum
/// <summary>
/// 板卡类型
/// </summary>
public enum BOARD_TYPE_DS : uint
{
DS400XM = 0, //M卡
DS400XH = 1, //H卡
DS4004HC = 2, //4004HC
DS4008HC = 3, //4008HC
DS4016HC = 4, //4016HC
DS4001HF = 5, //4001HF
DS4004HF = 6, //4004HF
DS4002MD = 7, //4002MD
DS4004MD = 8, //4004MD
DS4016HCS = 9, //4016HCS
DS4002HT = 10, //4002HT
DS4004HT = 11, //4004HT
DS4008HT = 12, //4008HT
DS4004HC_PLUS = 13, //4004HC+
DS4008HC_PLUS = 14, //4008HC+
DS4016HC_PLUS = 15, //4016HC+
DS4008HF = 16, //4008HF
DS4008MD = 17, //4008MD
DS4008HS = 18, //4008HS
DS4016HS = 19, //4016HS
INVALID_BOARD_TYPE = 0xffffffff,
}
/// <summary>
/// 视频预览格式
/// </summary>
public enum TypeVideoFormat
{
vdfRGB8A_233 = 0x00000001,
vdfRGB8R_332 = 0x00000002,
vdfRGB15Alpha = 0x00000004,
/// <summary>
/// 16位RGB视频压缩格式
/// </summary>
vdfRGB16 = 0x00000008,
/// <summary>
/// 24位RGB视频压缩格式
/// </summary>
vdfRGB24 = 0x00000010,
vdfRGB24Alpha = 0x00000020,
vdfYUV420Planar = 0x00000040,
/// <summary>
/// YUV422视频压缩格式
/// </summary>
vdfYUV422Planar = 0x00000080,
vdfYUV411Planar = 0x00000100,
vdfYUV420Interspersed = 0x00000200,
vdfYUV422Interspersed = 0x00000400,
vdfYUV411Interspersed = 0x00000800,
vdfYUV422Sequence = 0x00001000, /* U0, Y0, V0, Y1: For VO overlay */
vdfYUV422SequenceAlpha = 0x00002000,
/* U0, Y0, V0, Y1: For VO overlay, with low bit for alpha blending */
vdfMono = 0x00004000, /* 8 bit monochrome */
vdfYUV444Planar = 0x00008000,
};
/// <summary>
/// 视频制式
/// </summary>
public enum VideoStandard_t : uint
{
/// <summary>
/// 无视频信号
/// </summary>
StandardNone = 0x80000000,
/// <summary>
/// NTSC制式
/// </summary>
StandardNTSC = 0x00000001,
/// <summary>
/// PAL制式
/// </summary>
StandardPAL = 0x00000002,
StandardSECAM = 0x00000004,
} ;
/// <summary>
/// 编码图像分辨率
/// </summary>
public enum PictureFormat_t
{
ENC_CIF_FORMAT = 0,
ENC_QCIF_FORMAT = 1,
ENC_2CIF_FORMAT = 2,
ENC_4CIF_FORMAT = 3,
ENC_QQCIF_FORMAT = 4,
ENC_CIFQCIF_FORMAT = 5,
ENC_CIFQQCIF_FORMAT = 6,
ENC_DCIF_FORMAT = 7
};
/// <summary>
/// 码流控制方式
/// </summary>
public enum BitrateControlType_t
{
/// <summary>
/// 变码率
/// </summary>
brCBR = 0,
/// <summary>
/// 恒定码率
/// </summary>
brVBR = 1,
};
public enum FrameType_t
{
PktError = 0,
PktIFrames = 0x0001,
PktPFrames = 0x0002,
PktBBPFrames = 0x0004,
PktAudioFrames = 0x0008,
PktMotionDetection = 0x00010,
PktDspStatus = 0x00020,
PktOrigImage = 0x00040,
PktSysHeader = 0x00080,
PktBPFrames = 0x00100,
PktSFrames = 0x00200,
PktSubIFrames = 0x00400,
PktSubPFrames = 0x00800,
PktSubBBPFrames = 0x01000,
PktSubSysHeader = 0x02000
};
#endregion
#region struct
/// <summary>
/// 板卡信息结构体
/// </summary>
public struct DS_BOARD_DETAIL
{
/// <summary>
/// 板卡类型
/// </summary>
BOARD_TYPE_DS type;
/// <summary>
/// 序列号
/// BYTE sn[16];
/// </summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
byte[] sn;
/// <summary>
/// 板卡包含的DSP个数
/// </summary>
uint dspCount;
/// <summary>
/// 板卡上第一个DSP的索引
/// </summary>
uint firstDspIndex;
/// <summary>
/// 板卡包含的编码通道个数
/// </summary>
uint encodeChannelCount;
/// <summary>
/// 板卡上第一个编码通道的索引
/// </summary>
uint firstEncodeChannelIndex;
/// <summary>
/// 板卡包含的解码通道个数
/// </summary>
uint decodeChannelCount;
/// <summary>
/// 板卡上第一个解码通道的索引
/// </summary>
uint firstDecodeChannelIndex;
/// <summary>
/// 板卡包含的视频输出通道个数
/// </summary>
uint displayChannelCount;
/// <summary>
/// 板卡上第一个视频输出通道的索引
/// </summary>
uint firstDisplayChannelIndex;
uint reserved1;
uint reserved2;
uint reserved3;
/// <summary>
/// 硬件版本,format:major.minor.build,major:bit 16-19,minor: bit 8-15,build: bit 0-7
/// </summary>
uint version;
}
/// <summary>
/// DSP信息结构体
/// </summary>
public struct DSP_DETAIL
{
/// <summary>
/// 此DSP所包含的编码通道个数
/// </summary>
uint encodeChannelCount;
/// <summary>
/// 此DSP上第一个编码通道在所有编码通道中的索引
/// </summary>
uint firstEncodeChannelIndex;
/// <summary>
/// 此DSP所包含的解码通道个数
/// </summary>
uint decodeChannelCount;
/// <summary>
/// 此DSP上第一个解码通道在所有解码通道中的索引
/// </summary>
uint firstDecodeChannelIndex;
/// <summary>
/// 此DSP包含的显示通道个数
/// </summary>
uint displayChannelCount;
/// <summary>
/// 此DSP上第一个显示通道在所有显示通道中的索引
/// </summary>
uint firstDisplayChannelIndex;
uint reserved1;
uint reserved2;
uint reserved3;
uint reserved4;
}
/// <summary>
/// 特殊功能结构体
/// </summary>
public struct CHANNEL_CAPABILITY
{
/// <summary>
/// 音频预览
/// </summary>
byte[] bAudioPreview;
/// <summary>
/// 报警信号
/// </summary>
byte[] bAlarmIO;
/// <summary>
/// 看家狗
/// </summary>
byte[] bWatchDog;
}
/// <summary>
/// 版本信息
/// </summary>
public struct PVERSION_INFO
{
/// <summary>
/// DSP版本号，DSP的BUILD号，用于软件升级时标明该版本的最后修改时间
/// </summary>
ulong DspVersion, DspBuildNum;
/// <summary>
/// Driver版本号，Driver的BUILD号，用于软件升级时标明该版本的最后修改时间
/// </summary>
ulong DriverVersion, DriverBuildNum;
/// <summary>
/// SDK版本号，SDK的BUILD号，用于软件升级时标明该版本的最后修改时间
/// </summary>
ulong SDKVersion, SDKBuildNum;
}
/// <summary>
/// 显示窗口内的矩形区域
/// </summary>
//[StructLayout(LayoutKind.
//public struct RECT
//{
// public long left;
// public long top;
// public long right;
// public long bottom;
//}
/// <summary>
/// 帧统计信息结构体
/// </summary>
public struct PFRAMES_STATISTICS
{
/// <summary>
/// 视频帧
/// </summary>
ulong VideoFrames;
/// <summary>
/// 音频帧
/// </summary>
ulong AudioFrames;
/// <summary>
/// 丢失帧
/// </summary>
ulong FramesLost;
/// <summary>
/// 丢失的码流（字节）
/// </summary>
ulong QueueOverflow;
/// <summary>
/// 当前的帧率（bps）
/// </summary>
ulong CurBps;
}
/// <summary>
/// 版本信息结构体
/// </summary>
public struct PHW_VERSION
{
/// <summary>
/// DSP程序的版本号和Build号
/// </summary>
ulong DspVersion, DspBuildNum;
/// <summary>
/// 驱动程序的版本号和Build号
/// </summary>
ulong DriverVersion, DriverBuildNum;
/// <summary>
/// SDK 的版本号和Build号
/// </summary>
ulong SDKVersion, SDKBuildNum;
}
/// <summary>
/// 系统时间
/// </summary>
public struct SYSTEMTIME
{
ushort wYear;
ushort wMonth;
ushort wDayOfWeek;
ushort wDay;
ushort wHour;
ushort wMinute;
ushort wSecond;
ushort wMilliseconds;
}
#endregion
#region delegate
/// <summary>
/// 原始图像流设置
///
/// typedef void (*IMAGE_STREAM_CALLBACK)(UINT channelNumber,void *context);
/// </summary>
/// <param name="channelNumber">通道号</param>
/// <param name="context">设备上下文</param>
public delegate void IMAGE_STREAM_CALLBACK(uint channelNumber, IntPtr context);
/// <summary>
/// 编码数据流直接读取回调函数
///
/// typedef int (*STREAM_DIRECT_READ_CALLBACK)(ULONG channelNumber,void *DataBuf,DWORD Length,int FrameType,void *context);
/// </summary>
/// <param name="channelNumber">通道号</param>
/// <param name="DataBuf">缓冲区地址</param>
/// <param name="Length">缓冲区长度</param>
/// <param name="FrameType">缓冲区数据帧类型</param>
/// <param name="context">设备上下文</param>
/// <returns></returns>
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
//public delegate int STREAM_DIRECT_READ_CALLBACK(uint channelNumber, byte[] DataBuf, uint Length, FrameType_t FrameType, IntPtr context);
public delegate int STREAM_DIRECT_READ_CALLBACK(int channelNumber, IntPtr DataBuf, int Length, FrameType_t FrameType, IntPtr context);
//public unsafe delegate int STREAM_DIRECT_READ_CALLBACK(uint channelNumber, void * DataBuf, uint Length, int FrameType, IntPtr context);
/// <summary>
/// 直接读取码流回调函数
///
/// typedef int (*STREAM_READ_CALLBACK)(ULONG channelNumber, void *context)
/// </summary>
/// <param name="channelNumber">通道号</param>
/// <param name="context">设备上下文</param>
/// <returns></returns>
public delegate int STREAM_READ_CALLBACK(ulong channelNumber, IntPtr context);
/// <summary>
/// 移动侦测结果回调函数
///
/// typedef void (*MOTION_DETECTION_CALLBACK)(ULONG channelNumber, BOOL bMotionDetected,void *context)
/// </summary>
/// <param name="channelNumber">通道号</param>
/// <param name="bMotionDetected">
/// 移动侦测发生标志，如果当前通道所设置的移动侦测
/// 区域内产生了移动侦测，则被置为True；如果当前通道所设置的移动侦测区域内自上
/// 一次产生移动侦测后delay秒内没有发生移动侦测，则被置为False。
/// </param>
/// <param name="context">设备上下文</param>
public delegate void MOTION_DETECTION_CALLBACK(ulong channelNumber, bool bMotionDetected, IntPtr context);
/// <summary>
/// 画图回调函数
///
/// #define DRAWFUN(x) void (CALLBACK* x)(long nPort,HDC hDc,LONG nUser)
/// </summary>
/// <param name="nPort">通道号</param>
/// <param name="HDC">offscreen表面设备上下文，相当于显示窗口中的DC</param>
/// <param name="nUser">用户数据</param>
public delegate void DrawFun(long nPort, IntPtr HDC, long nUser);
/// <summary>
/// 解码回调函数
///
/// typedef void (*DECODER_VIDEO_CAPTURE_CALLBACK)(UINT nChannelNumber, void *DataBuf,UINT width,UINT height,UINT nFrameNum,UINT nFrameTime, SYSTEMTIME *pFrameAbsoluteTime,void *context)
/// </summary>
/// <param name="nChannelNumber">解码通道句柄</param>
/// <param name="DataBuf">缓冲区地址</param>
/// <param name="width">图像宽度</param>
/// <param name="height">图像高度</param>
/// <param name="nFrameNum">捕获的当前帧的序号</param>
/// <param name="nFrameTime">捕获的当前帧的相对时间，单位：毫秒</param>
/// <param name="pFrameAbsoluteTime">捕获的当前帧的绝对时间</param>
/// <param name="context">设备上下文</param>
public delegate void DECODER_VIDEO_CAPTURE_CALLBACK(uint nChannelNumber, IntPtr DataBuf, uint width, uint height, uint nFrameNum, uint nFrameTime, SYSTEMTIME pFrameAbsoluteTime, IntPtr context);
/// <summary>
/// 创建索引完成回调函数
///
/// typedef void (*FILE_REF_DONE_CALLBACK)(UINT nChannel,UINT nSize)
/// </summary>
/// <param name="nChannel">通道号</param>
/// <param name="nSize">索引大小（暂时无效，以后可以增加索引导出、导入功能） </param>
public delegate void FILE_REF_DONE_CALLBACK(uint nChannel, uint nSize);
#endregion
/// <summary>
/// DS40xxSDK.dll
/// </summary>
public class HikVisionSDK
{
/// <summary>
/// 状态
/// </summary>
public static readonly List<string> state = new List<string>(new string[]{
"", "正在打开", "音频信号丢失", "视频信号丢失", "有物体移动", //0-4
"自动分割录像", "开始录像", "停止录像", "启动声音监听", "停止声音监听", //5-9
"启动视频预览", "停止视频预览", "启动录像", "停止录像", "启动视频报警", //10-14
"关闭视频报警", "启动音频报警", "停止音频报警", "启动移动侦测", "停止移动侦测", //15-19
"启动视频遮挡", "关闭视频遮挡", "开始屏幕输出", "停止屏幕输出", "启动视频LOGO", //20-24
"停止视频LOGO", "开始视频OSD", "停止视频OSD", "切换为黑白视频", "切换为彩色视频", //25-29
"切换为黑屏显示", "切换为白屏显示", "视频色彩复位", "启动全屏显示", "采集卡已经加载", //30-34
"采集卡已经卸截", "视频服务启动成功", "视频服务已停止", "静音", "音量恢复", //35-39
"云台控制命令发送", "系统出现未知错误", "录像文件大小", "配置端口号成功", "连接服务端成功", //40-44
"正在连接", "开始接收图象", "异常退出", "接收完毕，退出", "无法联系服务端", //45-49
"服务端拒绝访问", "无效", "停止客户端连接", "图像抓取成功", "初始化服务端网络连接成功", //50-54
"视频服务启动失败", "退出全屏预览", "", "", "" //55-59
});
//可以用新版函数替代功能或者无效的API
//GetTotalChannels：可用GetEncodeChannelCount替代
//GetTotalDSPs：可用GetDspCount 替代
//SetupDateTime：4.0版本起无效
//HW_GetChannelNum：无效，请使用GetBoardDetail
//HW_GetDeviceSerialNo：无效，请使用GetBoardDetail
//HW_SetVideoOutStandard：无效，请使用SetDisplayStandard或SetDefaultVideoStandard
//HW_SetDspDeadlockMsg：无效
//HW_ResetDsp：无效
//HW_SetDisplayPara：DISPLAY_PARA结构中bToVideoOut无效，MD卡模拟视频输出功能
//已经整合到视频矩阵之中。
#region 流类型宏定义
/// <summary>
/// 视频流
/// #define STREAM_TYPE_VIDEO
/// </summary>
private const int STREAM_TYPE_VIDEO = 1;
/// <summary>
/// 音频流
/// #define STREAM_TYPE_AUDIO
/// </summary>
private const int STREAM_TYPE_AUDIO = 2;
/// <summary>
/// 音视频复合流
/// #define STREAM_TYPE_AVSYNC
/// </summary>
private const int STREAM_TYPE_AVSYNC = 3;
#endregion
#region 1.板卡初始化及卸载
/// <summary>
/// 1.1初始化DSP InitDSPs
/// 说 明： 初始化系统中每一块板卡，应在应用软件程序启动时完成。如果返回值为0则表
/// 明初始化失败，可能没有找到相应的DSP软件模块。
///
/// int __stdcall InitDSPs()
/// </summary>
/// <returns>系统内可用的编码通道个数。 </returns>
[DllImport("DS40xxSDK.dll")]
public static extern int InitDSPs();
/// <summary>
/// 1.2卸载DSP DeInitDSPs
/// 说 明： 关闭每一块板卡上的功能，应在应用软件程序退出时调用。
///
/// int __stdcall DeInitDSPs()
/// </summary>
/// <returns>0</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int DeInitDSPs();
#endregion
#region 2.板卡信息获取
/// <summary>
/// 2.1获取系统中板卡的张数GetBoardCount
/// 说 明： 获取系统中所有板卡的张数，包含编码卡和解码卡。
///
/// unsigned int __stdcall GetBoardCount()
/// </summary>
/// <returns>系统中板卡的总张数。</returns>
[DllImport("DS40xxSDK.dll")]
public static extern uint GetBoardCount();
/// <summary>
/// 2.2获取系统中DSP的个数GetDspCount
/// 说 明： 获取系统中所有板卡的DSP的个数。
///
/// unsigned int __stdcall GetDspCount()
/// </summary>
/// <returns>系统中DSP的总个数</returns>
[DllImport("DS40xxSDK.dll")]
public static extern uint GetDspCount();
/// <summary>
/// GetTotalDSPs：可用GetDspCount 替代
/// 获得实际可用DSP
/// </summary>
/// <returns></returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetTotalDSPs();
/// <summary>
/// 2.3获取系统中编码通道的个数GetEncodeChannelCount
/// 说 明： 获取系统中所有编码卡的编码通道总个数，包含H系列和HC系列编码卡。
///
/// unsigned int __stdcall GetEncodeChannelCount()
/// </summary>
/// <returns>系统中编码通道的个数</returns>
[DllImport("DS40xxSDK.dll")]
public static extern uint GetEncodeChannelCount();
/// <summary>
/// 2.4获取系统中解码通道的个数GetDecodeChannelCount
/// 说 明： 获取系统中MD卡的解码通道个数
///
/// unsigned int __stdcall GetDecodeChannelCount()
/// </summary>
/// <returns></returns>
[DllImport("DS40xxSDK.dll")]
public static extern uint GetDecodeChannelCount();
/// <summary>
/// 2.5获取系统中解码显示通道的个数GetDisplayChannelCount
/// 说 明： 获取系统中MD卡显示通道的个数，即模拟视频输出通道的个数
///
/// unsigned int __stdcall GetDisplayChannelCount()
/// </summary>
/// <returns>系统中显示通道的个数</returns>
[DllImport("DS40xxSDK.dll")]
public static extern uint GetDisplayChannelCount();
/// <summary>
/// 2.6获取板卡详细信息GetBoardDetail
/// 说 明： 获取某张板卡的详细信息
///
/// int __stdcall GetBoardDetail(UINT boardNum,DS_BOARD_DETAIL *pBoardDetail)
/// </summary>
/// <param name="boardNum">板卡索引</param>
/// <param name="pBoardDetail">板卡信息</param>
/// <returns>成功返回0；失败返回错误号</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetBoardDetail(uint boardNum, ref DS_BOARD_DETAIL pBoardDetail);
/// <summary>
/// 2.7获取DSP详细信息GetDspDetail
/// 说 明： 获取某个DSP的详细信息
///
/// int __stdcall GetDspDetail(UINT dspNum,DSP_DETAIL *pDspDetail)
/// </summary>
/// <param name="dspNum">DSP索引</param>
/// <param name="pDspDetail">DSP信息</param>
/// <returns>成功返回0；失败返回错误号</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetDspDetail(uint dspNum, ref DSP_DETAIL pDspDetail);
/// <summary>
/// 2.8获取板卡型号及序列号信息GetBoardInfo
/// 说 明： 获取板卡的型号及序列号信息
///
/// int __stdcall GetBoardInfo(HANDLE hChannelHandle, ULONG *BoardType, UCHAR *SerialNo)
/// </summary>
/// <param name="hChannelHandle">通道句柄</param>
/// <param name="BoardType">板卡型号</param>
/// <param name="SerialNo">
/// 板卡ID号, 内容为板卡序列号的ASCII的数值，次序为SerialNo[0] 对应最高位，
/// SerialNo[11]对应最低位。比如卡号为“40000002345”的值对应为 4,0,0,0,0,1,0,0,2,3,4,5 的整形数组。
/// </param>
/// <returns>成功为0；失败返回错误号 </returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetBoardInfo(IntPtr hChannelHandle, ulong BoardType, byte[] SerialNo);
/// <summary>
/// 2.9获取板卡特殊功能信息GetCapability
/// 说 明： 获取板卡特殊功能信息
///
/// int __stdcall GetCapability(HANDLE hChannelHandle, CHANNEL_CAPABILITY *Capability)
/// </summary>
/// <param name="hChannelHandle">通道句柄</param>
/// <param name="Capability">特殊功能 </param>
/// <returns>成功返回0；失败返回错误号</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetCapability(IntPtr hChannelHandle, CHANNEL_CAPABILITY Capability);
/// <summary>
/// 2.10获取板卡SDK信息GetSDKVersion
/// 说 明： 获取当前所使用的DSP、Driver、SDK版本号
///
/// int __stdcall GetSDKVersion(PVERSION_INFO VersionInfo)
/// </summary>
/// <param name="VersionInfo">版本信息</param>
/// <returns>成功返回0；失败返回错误号。</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetSDKVersion(ref PVERSION_INFO VersionInfo);
/// <summary>
/// 2.11获取板卡SDK及DSP错误报告GetLastErrorNum*，此函数只对H卡有效
/// 说 明： 获取SDK及DSP错误报告。此函数只对H卡有效，用于HC卡上返回0且无效
///
/// int __stdcall GetLastErrorNum(HANDLE hChannelHandle, ULONG *DspError, ULONG *SdkError)
/// </summary>
/// <param name="hChannelHandle">通道句柄</param>
/// <param name="DspError">DSP错误</param>
/// <param name="SdkError">SDK错误</param>
/// <returns>DSP错误信息、SDK错误信息</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int GetLastErrorNum(IntPtr hChannelHandle, ref int DspError, ref int SdkError);
#endregion
#region 3.编码卡API
#region 3.1通道打开及关闭
/// <summary>
/// 3.1.1打开通道ChannelOpen
/// 说 明： 打开通道，获取编码通道的操作句柄，与通道相关的操作需使用相对应的句柄。
///
/// HANDLE __stdcall ChannelOpen(int ChannelNum)
/// </summary>
/// <param name="ChannelNum">通道号（从0开始）</param>
/// <returns>成功返回有效句柄（值可能为0）；失败返回0xFFFFFFFF。</returns>
[DllImport("DS40xxSDK.dll")]
public static extern IntPtr ChannelOpen(int ChannelNum);
/// <summary>
/// 3.1.2关闭通道ChannelClose
/// 说 明： 关闭通道，释放相关资源
///
/// int __stdcall ChannelClose(HANDLE hChannelHandle)
/// </summary>
/// <param name="hChannelHandle">通道句柄</param>
/// <returns>成功返回0；失败返回错误号</returns>
[DllImport("DS40xxSDK.dll")]
public static extern int ChannelClose(IntPtr hChannelHandle);
#endregion
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