C# 转 c++ typedef struct

typedef struct
{
int Count;
struct
{
int Press;
int Code;
}Keys[6];
}VK_SENDKEY,*PVK_SENDKEY;

请问各位大神，这种c++格式转换成c#怎么表达啊，要调用c++编译的dll啊。 typedef?struct
[解决办法]

[StructLayout(LayoutKind.Sequential)]
public struct Key
{
    public int Press;
    public int Code;
}
[StructLayout(LayoutKind.Sequential)]
public struct VK_SENDKEY
{
    public int Count;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
    public Key[] Keys;
}

[解决办法]
KeyData.Keys = new Key[6];

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签名档： http://feiyun0112.cnblogs.com/
[解决办法]
struct _Key_
{
int Press;
int Code;
};

struct VK_SENDKEY
{
int Count;
_Key_ Keys[]=new _Key_[6];
};