函數調用導致堆棧不對稱。原因可能是托管的 PInvoke 簽名與非托管的目標簽名不匹配。
在dllimport中加入CallingConvention參數就行了，
[DllImport(PCAP_DLL, CharSet = CharSet.Auto, CallingConvention = CallingConvention.Cdecl)]
要注意C++與NET中數據類型的對應：
//c++:char * —- c#:string //傳入參數
//c++:char * —- c#:StringBuilder//傳出參數
//c++:char *變量名 —- c#:ref string 變量名
//c++:char *輸入變量名 —- c#:string 輸入變量名
//c++:char *輸出變量名 —- c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 輸出變量名
//c++:SHORT(short) —- c#:System.Int16
//c++:LONG(long) —- c#:System.Int32
C#調用C++的DLL搜集整理的所有數據類型轉換方式,可能會有重復或者多種方案,自己多測試
//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 輸出變量名 —- c#:StringBuilder 輸出變量名
//c++:LPCWSTR —- c#:IntPtr
//c++:BOOL —- c#:bool
//c++:HMODULE —- c#:IntPtr
//c++:HINSTANCE —- c#:IntPtr
//c++:結構體 —- c#:public struct 結構體{};
//c++:結構體 **變量名 —- c#:out 變量名 //C#中提前申明一個結構體實例化后的變量名
//c++:結構體 &變量名 —- c#:ref 結構體 變量名
//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 變量名 —- c#:byte 變量名
//c++:unsigned short 變量名 —- c#:ushort 變量名
//c++:unsigned int 變量名 —- c#:uint 變量名
//c++:unsigned long 變量名 —- c#:ulong 變量名
//c++:char 變量名 —- c#:byte 變量名 //C++中一個字符用一個字節表示,C#中一個字符用兩個字節表示
//c++:char 數組名[數組大小] —- c#:MarshalAs(UnmanagedType.ByValTStr, SizeConst = 數組大小)] public string 數組名; ushort
//c++:char * —- c#:string //傳入參數
//c++:char * —- c#:StringBuilder//傳出參數
//c++:char *變量名 —- c#:ref string 變量名
//c++:char *輸入變量名 —- c#:string 輸入變量名
//c++:char *輸出變量名 —- c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 輸出變量名
//c++:char ** —- c#:string
//c++:char **變量名 —- c#:ref string 變量名
//c++:const char * —- c#:string
//c++:char[] —- c#:string
//c++:char 變量名[數組大小] —- c#:[MarshalAs(UnmanagedType.ByValTStr,SizeConst=數組大小)] public string 變量名;
//c++:struct 結構體名 *變量名 —- c#:ref 結構體名 變量名
//c++:委托 變量名 —- c#:委托 變量名
//c++:int —- c#:int
//c++:int —- c#:ref int
//c++:int & —- c#:ref int
//c++:int * —- c#:ref int //C#中調用前需定義int 變量名 = 0;
//c++:*int —- c#:IntPtr
//c++:int32 PIPTR * —- c#:int32[]
//c++:float PIPTR * —- c#:float[]
//c++:double** 數組名 —- c#:ref double 數組名
//c++:double*[] 數組名 —- c#:ref double 數組名
//c++:long —- c#:int
//c++:ulong —- c#:int
//c++:UINT8 * —- c#:ref byte //C#中調用前需定義byte 變量名 = 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 * 對象名稱 —- c#:([MarshalAs(UnmanagedType.AsAny)]Object 對象名稱
//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#里重新定義一個Struct
//CallBack回調函數需要封裝在一個委托里，delegate static extern int FunCallBack(string str);
//unsigned char** ppImage替換成IntPtr ppImage
//int& nWidth替換成ref int nWidth
//int*, int&, 則都可用 ref int 對應
//雙針指類型參數，可以用 ref IntPtr
//函數指針使用c++: typedef double (*fun_type1)(double); 對應 c#:public delegate double fun_type1(double);
//char* 的操作c++: char*; 對應 c#:StringBuilder;
//c#中使用指針:在需要使用指針的地方 加 unsafe
//unsigned char對應public byte
/*
* typedef void (*CALLBACKFUN1W)(wchar_t*, void* pArg);
* typedef void (*CALLBACKFUN1A)(char*, void* pArg);
* bool BIOPRINT_SENSOR_API dllFun1(CALLBACKFUN1 pCallbackFun1, void* pArg);
* 調用方式為
* [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
* public delegate void CallbackFunc1([MarshalAs(UnmanagedType.LPWStr)] StringBuilder strName, IntPtr pArg);
*
*
*/
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