从c＃导出VirtualChannelGetInstance函数

Question

我想从C＃导出此函数：

HRESULT VCAPITYPE VirtualChannelGetInstance(
 _In_    REFIID refiid,
 _Inout_ ULONG  *pNumObjs,
 _Out_   VOID   **ppObjArray
);

我尝试过以下代码：

public static uint VirtualChannelGetInstance(IntPtr refiid, ref uint pNumObjs, ref IntPtr[] ppObjArray)  
{
      MessageBox.Show("VirtualChannelGetInstance ");
      return 0; 
}

问题是当调用来自C＃的导出函数时，我总是得到nullreference异常。可能有什么问题？

Answer 1

我通过更改VirtualChannelGetInstance声明来实现此目的：

public static uint VirtualChannelGetInstance(Guid refiid, ref ulong pNumObjs, void** ppObjArray)