+\subsection{Object comparison}\label{refcountequality}
+
+The $==$ and $!=$ operators of \helpref{wxWidgets COW objects}{refcountlist}
+always do a {\tt deep} comparison.
+
+This means that the equality operator will return \true if two objects are
+identic and not only if they share the same data.
+
+Note that wxWidgets follows the {\it STL philosophy}: when a comparison operator cannot
+be implemented efficiently (like for e.g. wxImage's $==$ operator which would need to
+compare pixel-by-pixel the entire image's data), it's not implemented at all.
+
+That's why not all reference-counted wxWidgets classes provide comparison operators.
+
+Also note that if you only need to do a {\tt shallow} comparison between two
+\helpref{wxObject}{wxobject}-derived classes, you should not use the $==$ and $!=$ operators
+but rather the \helpref{wxObject::IsSameAs}{wxobjectissameas} function.
+
+
+\subsection{Object destruction}\label{refcountdestruct}
+
+When a COW object destructor is called, it may not delete the data: if it's shared,
+the destructor will just decrement the shared data's reference count without destroying it.
+
+Only when the destructor of the last object owning the data is called, the data is really
+destroyed. As for all other COW-things, this happens transparently to the class users so
+that you shouldn't care about it.