c++库c#调用开发时需要注意的一点
因为业务需要,需要将一个? c++写的 dll库由 C# 来调用,于是乎google了很多相关的文章,照着写了个? C#程序,结果发现很多时候很简单调用,结果都错了,经过很多次的失败和郁闷,最后发现有个关键点,就是我们c++ 和? c#的数据类型要一一对照起来才可以,如下是从msdn上摘抄一段对照列表,很有用的
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Unmanaged type in Wtypes.h
Unmanaged C language type
Managed class name
Description
HANDLE
void*
System.IntPtr
32 bits on 32-bit Windows operating systems, 64 bits on 64-bit Windows operating systems.
BYTE
unsigned char
System.Byte
8 bits
SHORT
short
System.Int16
16 bits
WORD
unsigned short
System.UInt16
16 bits
INT
int
System.Int32
32 bits
UINT
unsigned int
System.UInt32
32 bits
LONG
long
System.Int32
32 bits
BOOL
long
System.Int32
32 bits
DWORD
unsigned long
System.UInt32
32 bits
ULONG
unsigned long
System.UInt32
32 bits
CHAR
char
System.Char
Decorate with ANSI.
WCHAR
wchar_t
System.Char
Decorate with Unicode.
LPSTR
char*
System.String or System.Text.StringBuilder
Decorate with ANSI.
LPCSTR
Const char*
System.String or System.Text.StringBuilder
Decorate with ANSI.
LPWSTR
wchar_t*
System.String or System.Text.StringBuilder
Decorate with Unicode.
LPCWSTR
Const wchar_t*
System.String or System.Text.StringBuilder
Decorate with Unicode.
FLOAT
Float
System.Single
32 bits
DOUBLE
Double
System.Double
64 bits
For corresponding types in Visual Basic 2005, C#, and C++, see the Introduction to the .NET Framework Class Library.
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