Austin's Note

public class MyEntryPoint implements IEntryPoint {
    public int createUI() {
        Display display = PlatformUI.createDisplay();
        LoginInfo info = null;
        while (info == null) {
            LogonDialog dialog = new LogonDialog(display.getActiveShell());
            try {
                info = checkLogin(dialog.getUsername(), dialog.getPassword());
            } catch (Exception e) {
                MessageDialog.openError(display.getActiveShell(), "Error", "Logon Fail:\n" + e.getMessage());
            }
        }
        return PlatformUI.createAndRunWorkbench( display, new ApplicationWorkbenchAdvisor());
    }
}