c++ - dll 中返回 void * 类型的函数，如何在C#中声明？

Question

C++中原型是怎样的：

extern "C" _declspec(dllexport) void * creat(const char* password);

整个怎么在C# 中调用啊，void * 正常对应的是 IntPtr，可总是说签名不正确，byte[]也不行

Answer 1

You should post the question code first. I think it may be that CallingConvention is not specified:

[DllImport("???.dll", EntryPoint = "creat", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
[return: MarshalAs(UnmanagedType.SysInt)]
public static extern IntPtr Create(...);

Answer 2

Incorrect signature? Are you sure it's not because your dll is 32-bit and your system is 64-bit?