for(IViewReference viewRef : windowPage.getViewReferences()) {
if(viewRef.getView(false) != null && viewRef.getView(false) instanceof IContactListView) {
String [ ] buttonTitle = { "OK" };
if(!store.getBoolean(PreferenceConstants.P_MAIN_WINDOW_CLOSING_STATUS)){
new GOIMWindowCloseDialog( window.getShell(), "GOIM minimized to System tray",
null, null, 0, buttonTitle, 0,
"Do not show again", true ).open();
}
window.getShell().setVisible(false);
return false;