CWinAppEx::WriteBinary
Visual Studio 2012
Writes binary data to the registry.
BOOL WriteBinary( LPCTSTR lpszEntry, LPBYTE pData, UINT nBytes );
The lpszEntry parameter is the name of a registry entry that is located under the default registry key for your application. To get or set the default registry key, use the methods CWinAppEx::GetRegistryBase and CWinAppEx::SetRegistryBase respectively.
If the key specified by lpszEntry does not exist, this method will create it.