I use Visual Studio 2005

When I compile, I get this error:

> 
> Error 1 error C2146: syntax error : missing ';' before identifier 'mDropEndTime'
> 
> 
> Error 2 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
> 
> 
> 

```
struct MB_SYN_DROPITEM_UPDATE : MSGBUF
{
    long                    mCid;           // Index
    unsigned long           mItemIdx;       // idx
    TIMESTAMP_STRUCT        mDropEndTime;   // This is error line
};

```

Why doesn't C++ know `TIMESTAMP_STRUCT`?