+// this macro must (unfortunately) be used in any class deriving from both
+// wxItemContainer and wxControl because otherwise there is ambiguity when
+// calling GetClientXXX() functions -- the compiler can't choose between the
+// two versions
+#define wxCONTROL_ITEMCONTAINER_CLIENTDATAOBJECT_RECAST \
+ void SetClientData(void *data) \
+ { wxControl::SetClientData(data); } \
+ void *GetClientData() const \
+ { return wxControl::GetClientData(); } \
+ void SetClientObject(wxClientData *data) \
+ { wxControl::SetClientObject(data); } \
+ wxClientData *GetClientObject() const \
+ { return wxControl::GetClientObject(); } \
+ void SetClientData(int n, void* clientData) \
+ { wxItemContainer::SetClientData(n, clientData); } \
+ void* GetClientData(int n) const \
+ { return wxItemContainer::GetClientData(n); } \
+ void SetClientObject(int n, wxClientData* clientData) \
+ { wxItemContainer::SetClientObject(n, clientData); } \
+ wxClientData* GetClientObject(int n) const \
+ { return wxItemContainer::GetClientObject(n); }
+