更新
本文会随着后续实践文章有相应的改动，请及时更新！
2010-12-21 HCNetSDK2010-12-21.rar
主要更新了SerialDataCallBack委托的pRecvDataBuffer参数数据类型，由string改为byte[]，这里感谢实践后指出，欢迎大家积极反馈！
2009-10-31 HCNetSDK2009-10-31.rar
主要更新了大部分结构体中byte[]初始大小指定，加上了[MarshalAs(UnmanagedType.ByValArray, SizeConst = HCNetSDK.SERIALNO_LEN)]类似的标记。
2009-10-24 HCNetSDK.cs
正文
一、代码截图
VS
二、 部分代码
由于代码过长（超过1W行），这里就不贴全部了，大家直接在更新下面下载最新的SDK即可。
/// 设置码流速度
/// </summary>
public const int NET_DVR_SETSPEED = 24;
/// <summary>
/// 保持与设备的心跳(如果回调阻塞，建议2秒发送一次)
/// </summary>
public const int NET_DVR_KEEPALIVE = 25;
//远程按键定义如下：
/* key value send to CONFIG program */
public const int KEY_CODE_1 = 1;
public const int KEY_CODE_2 = 2;
public const int KEY_CODE_3 = 3;
public const int KEY_CODE_4 = 4;
public const int KEY_CODE_5 = 5;
public const int KEY_CODE_6 = 6;
public const int KEY_CODE_7 = 7;
public const int KEY_CODE_8 = 8;
public const int KEY_CODE_9 = 9;
public const int KEY_CODE_0 = 10;
public const int KEY_CODE_POWER = 11;
public const int KEY_CODE_MENU = 12;
public const int KEY_CODE_ENTER = 13;
public const int KEY_CODE_CANCEL = 14;
public const int KEY_CODE_UP = 15;
public const int KEY_CODE_DOWN = 16;
public const int KEY_CODE_LEFT = 17;
public const int KEY_CODE_RIGHT = 18;
public const int KEY_CODE_EDIT = 19;
public const int KEY_CODE_ADD = 20;
public const int KEY_CODE_MINUS = 21;
public const int KEY_CODE_PLAY = 22;
public const int KEY_CODE_REC = 23;
public const int KEY_CODE_PAN = 24;
public const int KEY_CODE_M = 25;
public const int KEY_CODE_A = 26;
public const int KEY_CODE_F1 = 27;
public const int KEY_CODE_F2 = 28;
/* for PTZ control */
public const int KEY_PTZ_UP_START = KEY_CODE_UP;
public const int KEY_PTZ_UP_STOP = 32;
public const int KEY_PTZ_DOWN_START = KEY_CODE_DOWN;
public const int KEY_PTZ_DOWN_STOP = 33;
public const int KEY_PTZ_LEFT_START = KEY_CODE_LEFT;
public const int KEY_PTZ_LEFT_STOP = 34;
public const int KEY_PTZ_RIGHT_START = KEY_CODE_RIGHT;
public const int KEY_PTZ_RIGHT_STOP = 35;
/// <summary>
/// 光圈+
/// </summary>
public const int KEY_PTZ_AP1_START = KEY_CODE_EDIT; /* 光圈+ */
public const int KEY_PTZ_AP1_STOP = 36;
/// <summary>
/// 光圈-
/// </summary>
public const int KEY_PTZ_AP2_START = KEY_CODE_PAN; /* 光圈- */
public const int KEY_PTZ_AP2_STOP = 37;
/// <summary>
/// 聚焦+
/// </summary>
public const int KEY_PTZ_FOCUS1_START = KEY_CODE_A; /* 聚焦+ */
public const int KEY_PTZ_FOCUS1_STOP = 38;
/// <summary>
/// 聚焦-
/// </summary>
public const int KEY_PTZ_FOCUS2_START = KEY_CODE_M;/* 聚焦- */
public const int KEY_PTZ_FOCUS2_STOP = 39;
/// <summary>
/// 变倍+
/// </summary>
public const int KEY_PTZ_B1_START = 40; /* 变倍+ */
public const int KEY_PTZ_B1_STOP = 41;
/// <summary>
/// 变倍-
/// </summary>
public const int KEY_PTZ_B2_START = 42; /* 变倍- */
public const int KEY_PTZ_B2_STOP = 43;
//9000新增
public const int KEY_CODE_11 = 44;
public const int KEY_CODE_12 = 45;
public const int KEY_CODE_13 = 46;
public const int KEY_CODE_14 = 47;
public const int KEY_CODE_15 = 48;
public const int KEY_CODE_16 = 49;
/// <summary>
/// 获取网络应用参数 EMAIL
/// </summary>
public const int NET_DVR_GET_EMAILCFG = 228;//
/// <summary>
/// 设置网络应用参数 EMAIL
/// </summary>
public const int NET_DVR_SET_EMAILCFG = 229; //
//对应NET_DVR_EMAILCFG结构
//
public const int NET_DVR_GET_ALLHDCFG = 300; //
#region DS9000新增命令(_V30)
//设备编码类型配置(NET_DVR_COMPRESSION_AUDIO结构)
/// <summary>
/// 获取设备语音对讲编码参数
/// </summary>
public const int NET_DVR_GET_COMPRESSCFG_AUD = 1058; //
/// <summary>
/// 设置设备语音对讲编码参数
/// </summary>
public const int NET_DVR_SET_COMPRESSCFG_AUD = 1059; //
#endregion
/// <summary>
/// 预览异常
/// </summary>
public const int NET_DVR_REALPLAYEXCEPTION = 111;//
/// <summary>
/// 预览时连接断开
/// </summary>
public const int NET_DVR_REALPLAYNETCLOSE = 112;//
/// <summary>
/// 预览5s没有收到数据
/// </summary>
public const int NET_DVR_REALPLAY5SNODATA = 113; //
/// <summary>
/// 预览重连
/// </summary>
public const int NET_DVR_REALPLAYRECONNECT = 114; //
/// <summary>
/// 回放数据播放完毕
/// </summary>
public const int NET_DVR_PLAYBACKOVER = 101;//
/// <summary>
/// 回放异常
/// </summary>
public const int NET_DVR_PLAYBACKEXCEPTION = 102;//
/// <summary>
/// 回放时候连接断开
/// </summary>
public const int NET_DVR_PLAYBACKNETCLOSE = 103;//
/// <summary>
/// 回放5s没有收到数据
/// </summary>
public const int NET_DVR_PLAYBACK5SNODATA = 104;
#region DS-6001D/F
/// <summary>
/// DS-6001D Decoder
/// NET_DVR_DECODERINFO, *LPNET_DVR_DECODERINFO;
/// </summary>
public struct NET_DVR_DECODERINFO
{
/// <summary>
/// 解码设备连接的服务器IP
/// public byte byEncoderIP[16];
/// </summary>
public byte[] byEncoderIP;
/// <summary>
/// 解码设备连接的服务器的用户名
/// public byte byEncoderUser[16];
/// </summary>
public byte[] byEncoderUser;
/// <summary>
/// 解码设备连接的服务器的密码
/// public byte byEncoderPasswd[16];
/// </summary>
public byte[] byEncoderPasswd;
/// <summary>
/// 解码设备连接服务器的连接模式
本文转自over140 51CTO博客，原文链接：http://blog.51cto.com/over140/586618，如需转载请自行联系原作者
