How to call C/C++ sytle function from C# solution?
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1. Write native(unmanaged) code with C/C++, and make sure compile it as a DLL, the sample is as below
#include <iostream>
using namespace std;
extern "C"
{
_declspec(dllexport) int AddTwoNumber(int x, int y);
}
int AddTwoNumber(int x, int y)
{
return x+y;
}
2. Write managed code with C#, we can put it in a console application, like below:
static void Main(string[] args)
{
int result = AddTwoNumber(2, 77);
Console.WriteLine(result);
Console.Read();
}
[DllImport("E:\\TestTools\\UnManagedSolution\\Debug\\UnManagedSolution.dll", CallingConvention = CallingConvention.Cdecl)] // full path to reference the dll file
//[DllImport("E:\\TestTools\\UnManagedSolution\\Debug\\UnManagedSolution.dll", CallingConvention=CallingConvention.StdCall)] // just different CallingConvention
//[DllImport("UnManagedSolution.dll"), CallingConvention] // make sure copy the dll to the same folder with exe file
public extern static int AddTwoNumber(int x, int y);
Now it just works, try it! ^_^
原文：http://www.cnblogs.com/researcher/p/4990096.html
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