- wxASSERT_MSG(clientData[i] == NULL,
- wxT("Can't use client data with owner-drawn listboxes"));
+ if ( m_windowStyle & wxLB_OWNERDRAW )
+ {
+ wxASSERT_MSG(clientData[i] == NULL,
+ wxT("Can't use client data with owner-drawn listboxes"));
+ }
+ ListBox_SetItemData(GetHwnd(), i, clientData[i]);