在Serialize()的类重写中，您可以使用以下代码读取/写入m_TheData字节数组成员-及其大小-

void MyClass::Serialize(CArchive &ar)
{
    CDocument::Serialize(ar); // Replace "CDocument" with your IMMEDIATE base class!
    // Note: the "SIZE_T" type varies between 32- and 64-bit platforms/builds ...
    uint64_t dsFixed; // ... use this to guarantee a 64-bit 'size' write/read!
    if (ar.IsStoring()) {
        //... Write other stuff...
        // ...making sure you keep STRICT order compliance between write and read
        dsFixed = uint64_t(m_TheDataSize);
        ar << dsFixed; // Write the array size first...
        ar.Write(m_TheData,INT(m_TheDataSize)); // ...then the data
        //...
    }
    else {
        //... Read other stuff (see note above)
    //  delete m_TheData;    // Do this if it's not a newly-created class?
        ar >> dsFixed; // Read the array size first...
        m_TheDataSize = SIZE_T(dsFixed);
        m_TheData = new BYTE[m_TheDataSize]; // Allocate space for the data...
        ar.Read(m_TheData,UINT(m_TheDataSize)); // ...then load data from archive
        //...
    }
    return;
}

随时要求进一步的澄清和/或解释。

关于SIZE_T类型的注释：
尽管使用的方式与标准size_t类型几乎相同，但特定于MSVC的{​​{1}}是在SIZE_T中定义的，由basetsd.h或{ {1}}如下：Windows.h，其中afxwin.h本身定义为typedef ULONG_PTR SIZE_T;（64位版本）或ULONG_PTR（32位版本）。 / p>