EvtSpec     wspecs[] = { { 'mous', mous_down },  { 'mous', mous_moved }, { 'mous', mous_wheel },
                       { 'keyb', keyb_down },  { 'keyb', keyb_rep },
                       { 'wind', win_resize }, { 'wind', win_active } , { 'wind', win_notactive } };
targ = GetWindowEventTarget(wref);
err = InstallEventHandler(targ, upp, 8, wspecs, disp, nil);

err = GetRootControl(wref, root);
targ = GetControlEventTarget(root);
err = InstallEventHandler(targ, upp, 1, cspecs, disp, nil);

switch (eclass) {
case 'wind':
    if (ekind == win_resize) {
        OSResize();
        return true;
    }

    if (ekind == win_active) {
        ActivateWindow(fWindow, true);
        return true;
    }

    if (ekind == win_notactive) {
        ActivateWindow(fWindow, false);
        return true;
    }
    break;