AddToSubset
status_t AddToSubset(BWindow* window);
AddToSubset(m_parent);
AddToSubset(m_parent);
AddToSubset(parent);
AddToSubset(fWindow);
AddToSubset(parent);
AddToSubset(parent);
AddToSubset(parent);
AddToSubset(parent);
AddToSubset(parent);
AddToSubset(parent);
AddToSubset(fWindow);
AddToSubset(fWindow);
AddToSubset(listener);
AddToSubset(fParentWindow);
progressWindow->AddToSubset(this);
AddToSubset(target);
AddToSubset(target);
if (!subset->AddToSubset(window))
bool AddToSubset(Window* window);
status_t status = window->AddToSubset(this);