C++与C#类型对应表

函数调用导致堆栈不对称。原因可能是托管的 PInvoke 签名与非托管的目标签名不匹配。
在dllimport中加入CallingConvention参数就行了，

[DllImport(PCAP_DLL, CharSet = CharSet.Auto, CallingConvention = CallingConvention.Cdecl)]


要注意C++与NET中数据类型的对应：

//c++:char * c#:string //传入参数
//c++:char * c#:StringBuilder//传出参数
//c++:char *变量名 c#:ref string 变量名
//c++:char *输入变量名 c#:string 输入变量名
//c++:char *输出变量名 c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 输出变量名
//c++:SHORT(short) c#:System.Int16
//c++:LONG(long) c#:System.Int32

转载收集：

//C#调用C++的DLL搜集整理的所有数据类型转换方式,可能会有重复或者多种方案,自己多测试
//c++:HANDLE(void *) c#:System.IntPtr
//c++:Byte(unsigned char) c#:System.Byte
//c++:SHORT(short) c#:System.Int16
//c++:WORD(unsigned short) c#:System.UInt16
//c++:INT(int) c#:System.Int16
//c++:INT(int) c#:System.Int32
//c++:UINT(unsigned int) c#:System.UInt16
//c++:UINT(unsigned int) c#:System.UInt32
//c++:LONG(long) c#:System.Int32
//c++:ULONG(unsigned long) c#:System.UInt32
//c++:DWORD(unsigned long) c#:System.UInt32
//c++:DECIMAL c#:System.Decimal
//c++:BOOL(long) c#:System.Boolean
//c++:CHAR(char) c#:System.Char
//c++:LPSTR(char *) c#:System.String
//c++:LPWSTR(wchar_t *) c#:System.String
//c++:LPCSTR(const char *) c#:System.String
//c++:LPCWSTR(const wchar_t *) c#:System.String
//c++:PCAHR(char *) c#:System.String
//c++:BSTR c#:System.String
//c++:FLOAT(float) c#:System.Single
//c++:DOUBLE(double) c#:System.Double
//c++:VARIANT c#:System.Object
//c++:PBYTE(byte *) c#:System.Byte[]
//c++:BSTR c#:StringBuilder
//c++:LPCTSTR c#:StringBuilder
//c++:LPCTSTR c#:string
//c++:LPTSTR c#:[MarshalAs(UnmanagedType.LPTStr)] string
//c++:LPTSTR 输出变量名 c#:StringBuilder 输出变量名
//c++:LPCWSTR c#:IntPtr
//c++:BOOL c#:bool
//c++:HMODULE c#:IntPtr
//c++:HINSTANCE c#:IntPtr
//c++:结构体 c#:public struct 结构体{};
//c++:结构体 **变量名 c#:out 变量名 //C#中提前申明一个结构体实例化后的变量名
//c++:结构体 &变量名 c#:ref 结构体 变量名
//c++:WORD c#:ushort
//c++:DWORD c#:uint
//c++:DWORD c#:int
//c++:UCHAR c#:int
//c++:UCHAR c#:byte
//c++:UCHAR* c#:string
//c++:UCHAR* c#:IntPtr
//c++:GUID c#:Guid
//c++:Handle c#:IntPtr
//c++:HWND c#:IntPtr
//c++:DWORD c#:int
//c++:COLORREF c#:uint
//c++:unsigned char c#:byte
//c++:unsigned char * c#:ref byte
//c++:unsigned char * c#:[MarshalAs(UnmanagedType.LPArray)] byte[]
//c++:unsigned char * c#:[MarshalAs(UnmanagedType.LPArray)] Intptr
//c++:unsigned char & c#:ref byte
//c++:unsigned char 变量名 c#:byte 变量名
//c++:unsigned short 变量名 c#:ushort 变量名
//c++:unsigned int 变量名 c#:uint 变量名
//c++:unsigned long 变量名 c#:ulong 变量名
//c++:char 变量名 c#:byte 变量名 //C++中一个字符用一个字节表示,C#中一个字符用两个字节表示
//c++:char 数组名[数组大小] c#:MarshalAs(UnmanagedType.ByValTStr, SizeConst = 数组大小)] public string 数组名; ushort
//c++:char * c#:string //传入参数
//c++:char * c#:StringBuilder//传出参数
//c++:char *变量名 c#:ref string 变量名
//c++:char *输入变量名 c#:string 输入变量名
//c++:char *输出变量名 c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 输出变量名
//c++:char ** c#:string
//c++:char **变量名 c#:ref string 变量名
//c++:const char * c#:string
//c++:char[] c#:string
//c++:char 变量名[数组大小] c#:[MarshalAs(UnmanagedType.ByValTStr,SizeConst=数组大小)] public string 变量名;
//c++:struct 结构体名 *变量名 c#:ref 结构体名 变量名
//c++:委托 变量名 c#:委托 变量名
//c++:int c#:int
//c++:int c#:ref int
//c++:int & c#:ref int
//c++:int * c#:ref int //C#中调用前需定义int 变量名 = 0;
//c++:*int c#:IntPtr
//c++:int32 PIPTR * c#:int32[]
//c++:float PIPTR * c#:float[]
//c++:double** 数组名 c#:ref double 数组名
//c++:double*[] 数组名 c#:ref double 数组名
//c++:long c#:int
//c++:ulong c#:int
//c++:UINT8 * c#:ref byte //C#中调用前需定义byte 变量名 = new byte();
//c++:handle c#:IntPtr
//c++:hwnd c#:IntPtr
//c++:void * c#:IntPtr
//c++:void * user_obj_param c#:IntPtr user_obj_param
//c++:void * 对象名称 c#:([MarshalAs(UnmanagedType.AsAny)]Object 对象名称
//c++:char, INT8, SBYTE, CHAR c#:System.SByte
//c++:short, short int, INT16, SHORT c#:System.Int16
//c++:int, long, long int, INT32, LONG32, BOOL , INT c#:System.Int32
//c++:__int64, INT64, LONGLONG c#:System.Int64
//c++:unsigned char, UINT8, UCHAR , BYTE c#:System.Byte
//c++:unsigned short, UINT16, USHORT, WORD, ATOM, WCHAR , __wchar_t c#:System.UInt16
//c++:unsigned, unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT c#:System.UInt32
//c++:unsigned __int64, UINT64, DWORDLONG, ULONGLONG c#:System.UInt64
//c++:float, FLOAT c#:System.Single
//c++:double, long double, DOUBLE c#:System.Double



//Win32 Types —- CLR Type

//Struct需要在C#里重新定义一个Struct
//CallBack回调函数需要封装在一个委托里，delegate static extern int FunCallBack(string str);

//unsigned char** ppImage替换成IntPtr ppImage
//int& nWidth替换成ref int nWidth
//int*, int&, 则都可用 ref int 对应
//双针指类型参数，可以用 ref IntPtr
//函数指针使用c++: typedef double (*fun_type1)(double); 对应 c#:public delegate double fun_type1(double);
//char* 的操作c++: char*; 对应 c#:StringBuilder;
//c#中使用指针:在需要使用指针的地方 加 unsafe

//unsigned char对应public byte
/*
* typedef void (*CALLBACKFUN1W)(wchar_t*, void* pArg);
* typedef void (*CALLBACKFUN1A)(char*, void* pArg);
* bool BIOPRINT_SENSOR_API dllFun1(CALLBACKFUN1 pCallbackFun1, void* pArg);
* 调用方式为
* [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
* public delegate void CallbackFunc1([MarshalAs(UnmanagedType.LPWStr)] StringBuilder strName, IntPtr pArg);
*