如何将C++类型转换成C#对应类型以实现dll函数调用

C#中调用Windows API时的数据类型对应关系						

   

BOOL=System.Int32					BOOLEAN=System.Int32					BYTE=System.UInt16

CHAR=System.Int16					COLORREF=System.UInt32					DWORD=System.UInt32

DWORD32=System.UInt32				DWORD64=System.UInt64					FLOAT=System.Float

HACCEL=System.IntPtr				HANDLE=System.IntPtr					HBITMAP=System.IntPtr

HBRUSH=System.IntPtr				HCONV=System.IntPtr						HCONVLIST=System.IntPtr

HCURSOR=System.IntPtr				HDC=System.IntPtr						HDDEDATA=System.IntPtr

HDESK=System.IntPtr					HDROP=System.IntPtr						HDWP=System.IntPtr

HENHMETAFILE=System.IntPtr			HFILE=System.IntPtr						HFONT=System.IntPtr

HGDIOBJ=System.IntPtr				HGLOBAL=System.IntPtr					HHOOK=System.IntPtr

HICON=System.IntPtr					HIMAGELIST=System.IntPtr				HIMC=System.IntPtr

HINSTANCE=System.IntPtr				HKEY=System.IntPtr						HLOCAL=System.IntPtr

HMENU=System.IntPtr					HMETAFILE=System.IntPtr					HMODULE=System.IntPtr

HMONITOR=System.IntPtr				HPALETTE=System.IntPtr					HPEN=System.IntPtr

HRGN=System.IntPtr					HRSRC=System.IntPtr						HSZ=System.IntPtr

HWINSTA=System.IntPtr				HWND=System.IntPtr						INT=System.Int32	

INT32=System.Int32					INT64=System.Int64						LONG=System.Int32	

LONG32=System.Int32					LONG64=System.Int64						LONGLONG=System.Int64	

LPARAM=System.IntPtr				LPBOOL=System.Int16[]					LPBYTE=System.UInt16[]	

LPCOLORREF=System.UInt32[]			LPCSTR=System.String					LPCTSTR=System.String	

LPCVOID=System.UInt32				LPCWSTR=System.String					LPDWORD=System.UInt32[]	

LPHANDLE=System.UInt32				LPINT=System.Int32[]					LPLONG=System.Int32[]	

LPSTR=System.String					LPTSTR=System.String					LPVOID=System.UInt32	

LPWORD=System.Int32[]				LPWSTR=System.String					LRESULT=System.IntPtr

PBOOL=System.Int16[]				PBOOLEAN=System.Int16[]					PBYTE=System.UInt16[]	

PCHAR=System.Char[]					PCSTR=System.String						PCTSTR=System.String	

PCWCH=System.UInt32					PCWSTR=System.UInt32					PDWORD=System.Int32[]	

PFLOAT=System.Float[]				PHANDLE=System.UInt32					PHKEY=System.UInt32	

PINT=System.Int32[]					ID=System.UInt32						PLONG=System.Int32[]	

PLUID=System.UInt32					PSHORT=System.Int16[]					PSTR=System.String	

PTBYTE=System.Char[]				PTCHAR=System.Char[]					PTSTR=System.String	

PUCHAR=System.Char[]				PUINT=System.UInt32[]					PULONG=System.UInt32[]	

PUSHORT=System.UInt16[]				PVOID=System.UInt32						PWCHAR=System.Char[]	

PWORD=System.Int16[]				PWSTR=System.String						REGSAM=System.UInt32	

SC_HANDLE=System.IntPtr				SC_LOCK=System.IntPtr					SHORT=System.Int16	

SIZE_T=System.UInt32				SSIZE_=System.UInt32					TBYTE=System.Char	

TCHAR=System.Char					UCHAR=System.Byte						UINT=System.UInt32	

UINT32=System.UInt32				UINT64=System.UInt64					ULONG=System.UInt32	

ULONG32=System.UInt32				ULONG64=System.UInt64					ULONGLONG=System.UInt64	

USHORT=System.UInt16				WORD=System.UInt16						WPARAM=System.IntPtr	





<---------补充----------->

Wtypes.h 中的非托管类型    	非托管C 语言类型    	托管类名       							说明 

HANDLE                 		void*            	System.IntPtr  							32 位 

BYTE                    	unsigned char       System.Byte    							8 位 

SHORT                    	short             	System.Int16   							16 位 

WORD                     	unsigned short      System.UInt16  							16 位 

INT                     	int                 System.Int32   							32 位 

UINT                    	unsigned int      	System.UInt32  							32 位 

LONG                    	long             	System.Int32   							32 位 

BOOL                     	long             	System.Int32   							32 位 

DWORD                   	unsigned long       System.UInt32  							32 位 

ULONG                    	unsigned long   	System.UInt32  							32 位 

CHAR                      	char             	System.Char    							用 ANSI 修饰。 

LPSTR                     	char*              	System.String 或 System.StringBuilder 	用 ANSI 修饰。 

LPCSTR                    	Const char*         System.String 或 System.StringBuilder 	用 ANSI 修饰。 

LPWSTR                    	wchar_t*           	System.String 或 System.StringBuilder 	用 Unicode 修饰。 

LPCWSTR                 	Const wchar_t*    	System.String 或 System.StringBuilder 	用 Unicode 修饰。 

FLOAT                     	Float            	System.Single 							32 位 

DOUBLE                   	Double           	System.Double 							64 位

        [StructLayout(LayoutKind.Sequential)]

        struct tagMinutiae

        {

            [MarshalAs(UnmanagedType.I2)]

            public short x; // 横坐标 

            [MarshalAs(UnmanagedType.I2)]

            public short y; // 纵坐标 

            [MarshalAs(UnmanagedType.I2)]

            public short Direction; // 方向 

            [MarshalAs(UnmanagedType.SafeArray, SizeConst = 3)]

            public short[] Triangle;

            [MarshalAs(UnmanagedType.I2)]

            public short Type; // 类型 

        }

        [StructLayout(LayoutKind.Sequential)]

        struct tagFeature

        {

            [MarshalAs(UnmanagedType.I2)]

            public short MinutiaNum;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = MAX_MINUTIANUM, ArraySubType = UnmanagedType.Struct)]

            public tagMinutiae[] MinutiaArr;

        }



        [DllImport(" ")]

        public static extern short GetMinutia(ref byte[] lpData, ref byte[] lpOrient, IntPtr feature, short IMGW, short IMGH);