错误C2440：'功能'：无法从'常量IID'到'DWORD'转换 [英] error C2440: 'function' : cannot convert from 'const IID' to 'DWORD'

问题描述

在尝试举办CLR，我不断收到这样的：

While trying to host the CLR, I keep getting this:

错误C2440：'功能'：无法从'常量IID转换为DWORD

error C2440: 'function' : cannot convert from 'const IID' to 'DWORD'

我的code：

ICLRRuntimeHost *host = NULL;
HRESULT result = CorBindToRuntime(NULL, L"wks", CLSID_CLRRuntimeHost, 
    IID_ICLRRuntimeHost, (PVOID*)&host);

这是在C，顺便说一句。不是C ++。

This is in C, by the way. Not C++.

编辑：当我编译这与C ++，它工作得很好。难道不应该具有相同的行为在任何语言？

When I compile this with C++, it works just fine. Shouldn't it behave the same in either language?

推荐答案

从guiddef.h：

From guiddef.h:

#ifndef _REFIID_DEFINED
#define _REFIID_DEFINED
#ifdef __cplusplus
#define REFIID const IID &
#else
#define REFIID const IID * __MIDL_CONST
#endif
#endif

#ifndef _REFCLSID_DEFINED
#define _REFCLSID_DEFINED
#ifdef __cplusplus
#define REFCLSID const IID &
#else
#define REFCLSID const IID * __MIDL_CONST
#endif
#endif

在换言之，在C ++中，这两个是引用，并且在C，它们是指针。您需要使用：

In other words, in C++, those two are references, and in C, they are pointers. You need to use:

ICLRRuntimeHost *host = NULL;
HRESULT result = CorBindToRuntime(NULL, L"wks", &CLSID_CLRRuntimeHost,
    &IID_ICLRRuntimeHost, (PVOID*)&host);

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