高难度的来了，C#调用C++库函数，库函数里的结构体里有函数，这怎么引用？

[热情的菜鸟]

//先道个歉，只有85分了，很久不来了。
//以下是C++头文件
    //回调函数定义;每个回调函数既是返回的一个事件点。
    typedef struct {
        //命令发送成功，目标设备有响应。
        void (*PTK_UserCommandSuccessful)(const void* sender, uint receid, uchar hostid, uchar terid, uchar commandcode);
        //命令发送失败，目标设备无响应。
        void (*PTK_UserCommandDelete)(const void* sender, uint receid, uchar hostid, uchar terid, uchar commandcode);
        //报警信息 
        void (*PTK_Alarm_Information)(const void* sender, uint receid, uchar hostid, uchar terid, uchar areaid, EPTK_Alarm_Event Eventcode);
        // 键盘显示 需主机为V3.3以上版本才有响应
        void (*PTK_Alarm_KpdDisplay)(const void* sender, uint receid, uchar hostid, uchar* Dis1, uchar* Dis2);
    }SPTK_callbackFun;

//DLL初始化函数：完成内存分配，线程开启等操作，获取相应的充分的系统资源。
PTKALARMLIB_API void* Init_PTKAlarmlib(const void* sender, SPTK_callbackFun* CallBack);

@版主

[热情的菜鸟]

[热情的菜鸟]

目前C#代码是这样写的，可是行不通。x86也设置了。

        //回调函数定义;每个回调函数既是返回的一个事件点。
        [StructLayout( LayoutKind.Sequential )]
        public struct SPTK_callbackFun {
            [DllImport( "AlarmSDK.dll", EntryPoint = "PTK_UserCommandSuccessful", CallingConvention = CallingConvention.StdCall )]
            public static extern IntPtr PTK_UserCommandSuccessful( ref byte sender, System.UInt16 receid, int hostid, int terid, int commandcode );

            [DllImport( "AlarmSDK.dll", EntryPoint = "PTK_UserCommandDelete", CallingConvention = CallingConvention.StdCall )]
            public static extern IntPtr PTK_UserCommandDelete( ref byte sender, System.UInt16 receid, int hostid, int terid, int commandcode );

            [DllImport( "AlarmSDK.dll", EntryPoint = "PTK_Alarm_Information", CallingConvention = CallingConvention.StdCall )]
            public static extern IntPtr PTK_Alarm_Information( ref byte sender, System.UInt16 receid, int hostid, int terid, int areaid, EPTK_Alarm_Event Eventcode );

            [DllImport( "AlarmSDK.dll", EntryPoint = "PTK_Alarm_KpdDisplay", CallingConvention = CallingConvention.StdCall )]
            public static extern IntPtr PTK_Alarm_KpdDisplay( ref byte sender, System.UInt16 receid, int hostid, int Dis1, int Dis2 );
        }

        //PTKALARMLIB_API void* Init_PTKAlarmlib(const void* sender, SPTK_callbackFun* CallBack);
        [DllImport( "AlarmSDK.dll", EntryPoint = "Init_PTKAlarmlib", CallingConvention = CallingConvention.StdCall )]
        public static extern IntPtr P_Client_QueryRecord( ref byte zero, ref SPTK_callbackFun pInfo );

[热情的菜鸟]

[键盘敲出字]

你的定义看起来好多都不对。
首先，uint和uchar你需要查看文件中是如何定义的，这样子才是能确定对应的类型，单单从名称来看像是无符号32和无符号8。
其次，结构体里面是回调函数，对应的应该是委托。
应该是像这个样子

//这里假定
//uint  = unsigned int  = 无符号32 = C# uint   
//uchar = unsigned char = 无符号8  = C# byte  
//实际你需要根据C++文件的实际定义查看然后转成对应的C#类型
public delegate void _PTK_UserCommandSuccessful(System.IntPrt sender,uint receid, byte hostid, byte terid, byte commandcode);
//其余省略...

[StructLayout( LayoutKind.Sequential )]
public struct SPTK_callbackFun {
 public _PTK_UserCommandSuccessful PTK_UserCommandSuccessful;
//其余省略...
}

[xian_wwq]

1.基本类型要正确对应 2. StructLayout特性支持三种附加字段：CharSet、Pack、Size 需要显示定义，任何一项不对应都会导致错误 3.回调函数需要用委托来对应

[zxy2847225301]

数据类型的是结构体的我没有试过，你这边的C++代码的数据类型结构体，C#这边传入也应该是结构体，而且你C++这边有不定性的指针，需要把C++的代码贴出来才能决定C#这边该如何传入数据

[杀马特丶蛮牛]

报警信息的没转换，其他几个转换了一下

/// Return Type: void
///sender: void*
///receid: int
///hostid: char
///terid: char
///commandcode: char
public delegate void _PTK_UserCommandSuccessful(System.IntPtr sender, int receid, byte hostid, byte terid, byte commandcode);

/// Return Type: void
///sender: void*
///receid: int
///hostid: char
///terid: char
///commandcode: char
public delegate void _PTK_UserCommandDelete(System.IntPtr sender, int receid, byte hostid, byte terid, byte commandcode);

/// Return Type: void
///sender: void*
///receid: int
///hostid: char
///Dis1: char*
///Dis2: char*
public delegate void _PTK_Alarm_KpdDisplay(System.IntPtr sender, int receid, byte hostid, System.IntPtr Dis1, System.IntPtr Dis2);

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct SPTK_callbackFun {
    
    /// _PTK_UserCommandSuccessful
    public _PTK_UserCommandSuccessful AnonymousMember1;
    
    /// _PTK_UserCommandDelete
    public _PTK_UserCommandDelete AnonymousMember2;
    
    /// _PTK_Alarm_KpdDisplay
    public _PTK_Alarm_KpdDisplay AnonymousMember3;
}

public partial class NativeMethods {
    
    /// Return Type: void*
    ///sender: void*
    ///CallBack: SPTK_callbackFun*
    [System.Runtime.InteropServices.DllImportAttribute("<Unknown>", EntryPoint="Init_PTKAlarmlib")]
public static extern  System.IntPtr Init_PTKAlarmlib(System.IntPtr sender, ref SPTK_callbackFun CallBack) ;