To use a CWnd-derived object, pass the RUNTIME_CLASS of the object to the CreateView function as you would if you were using a CView-derived class. Your class must use DECLARE_DYNCREATE and IMPLEMENT_DYNCREATE because the framework uses dynamic creation at runtime. Although there is a lot of code in CSplitterWnd that is specific to the CView class, CObject::IsKindOf is always used before those actions are performed.