Interop时候.Net和Win32对应数据类型

Win32 Types	Specification	CLR Type
char, INT8, SBYTE, CHAR(^)	8-bit signed integer	System.SByte
short, short int, INT16, SHORT	16-bit signed integer	System.Int16
int, long, long int, INT32, LONG32, BOOL(^) , INT	32-bit signed integer	System.Int32
__int64, INT64, LONGLONG	64-bit signed integer	System.Int64
unsigned char, UINT8, UCHAR(^) , BYTE	8-bit unsigned integer	System.Byte
unsigned short, UINT16, USHORT, WORD, ATOM, WCHAR(^) , __wchar_t	16-bit unsigned integer	System.UInt16
unsigned, unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT	32-bit unsigned integer	System.UInt32
unsigned __int64, UINT64, DWORDLONG, ULONGLONG	64-bit unsigned integer	System.UInt64
float, FLOAT	Single-precision floating point	System.Single
double, long double, DOUBLE	Double-precision floating point	System.Double
(^) In Win32 this type is an integer with a specially assigned meaning; in contrast, the CLR provides a specific type devoted to this meaning.

对HANDLE、PVOID或LPVOID类型，用System.IntPtr。比较null值，用Int32.Zero。