Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining


Use WriteClass to store the version and class information of a base class during serialization of the derived class.

void WriteClass(
   const CRuntimeClass* pClassRef 


A pointer to the CRuntimeClass structure that corresponds to the class reference requested.

WriteClass writes a reference to the CRuntimeClass for the base class to the CArchive. Use CArchive::ReadClass to retrieve the reference.

WriteClass verifies that the archived class information is compatible with your runtime class. If it is not compatible, WriteClass will throw a CArchiveException.

Your runtime class must use DECLARE_SERIAL and IMPLEMENT_SERIAL; otherwise, WriteClass will throw a CNotSupportedException.

You can use SerializeClass instead of WriteClass, which handles both reading and writing of the class reference.

CFile myFile(_T("My__test__file.dat"), 
   CFile::modeCreate | CFile::modeReadWrite);

// Create a storing archive.
CArchive arStore(&myFile, CArchive::store);

// Store the class CAge in the archive.

// Close the storing archive.

// Create a loading archive.
CArchive arLoad(&myFile, CArchive::load);

// Load a class from the archive.
CRuntimeClass* pClass = arLoad.ReadClass();
if (!pClass->IsDerivedFrom(RUNTIME_CLASS(CAge)))

Header: afx.h

Community Additions

© 2015 Microsoft