Type correspondence between C/C ++ and C,

Type correspondence between C/C ++ and C,

Recently, we have been studying functions related to pos printers. Calling winapi and cross-process communication all involve conversions between types.

C/C ++	C #
HANDLE, LPDWORD, LPVOID, void *	IntPtr
Maid, LPSTR, LPSTR, char *, const char *, Wchar_t *, LPWSTR	String [in], StringBuilder [in, out]
DWORD, unsigned long, Ulong	UInt32, [financialas (UnmanagedType. U4)]
Bool	Bool
LP <struct>	[In] ref <struct>
SIZE_T	Uint
LPDWORD	Out uint
LPTSTR	[Out] StringBuilder
PULARGE_INTEGER	Out ulong
WORD	UInt16
Byte, unsigned char	Byte
Short	Int16
Long, int	Int32
Float	Single
Double	Double
NULL pointer	IntPtr. Zero
Uint	Uint32

 

Windows Data Type	. NET Data Type
BOOL, BOOLEAN	Boolean or Int32
BSTR	String
BYTE	Byte
CHAR	Char
DOUBLE	Double
DWORD	Int32 or UInt32
FLOAT	Single
HANDLE (and all other handle types, such as HFONT and HMENU)	IntPtr, UintPtr or HandleRef
HRESULT	Int32 or UInt32
INT	Int32
LANGID	Int16 or UInt16
LCID	Int32 or UInt32
LONG	Int32
LPARAM	IntPtr, UintPtr or Object
LPCSTR	String
LPCTSTR	String
LPCWSTR	String
LPSTR	String or StringBuilder *
LPTSTR	String or StringBuilder
LPWSTR	String or StringBuilder
LPVOID	IntPtr, UintPtr or Object
LRESULT	IntPtr
SAFEARRAY	. NET array type
SHORT	Int16
TCHAR	Char
UCHAR	SByte
UINT	Int32 or UInt32
ULONG	Int32 or UInt32
VARIANT	Object
VARIANT_BOOL	Boolean
WCHAR	Char
WORD	Int16 or UInt16
WPARAM	IntPtr, UintPtr or Object

 

Wtypes. hIn	Unmanaged C language type	Managed class name	Description
HANDLE	Void *	System. IntPtr	32-bit Windows and 64-bit Windows.
BYTE	Unsigned char	System. Byte	8-digit
SHORT	Short	System. Int16	16-bit
WORD	Unsigned short	System. UInt16	16-bit
INT	Int	System. Int32	32-bit
UINT	Unsigned int	System. UInt32	32-bit
LONG	Long	System. Int32	32-bit
BOOL	Long	System. Int32	32-bit
DWORD	Unsigned long	System. UInt32	32-bit
ULONG	Unsigned long	System. UInt32	32-bit
CHAR	Char	System. Char	It is modified with ANSI.
LPSTR	Char *	System. String or System. Text. StringBuilder	It is modified with ANSI.
LPCSTR	Const char *	System. String or System. Text. StringBuilder	It is modified with ANSI.
LPWSTR	Wchar_t *	System. String or System. Text. StringBuilder	Use Unicode.
LPCWSTR	Const wchar_t *	System. String or System. Text. StringBuilder	Use Unicode.
FLOAT	Float	System. Single	32-bit
DOUBLE	Double	System. Double	64-bit