GUI responsiveness with cairngorm event

Hi Experts,

i am stuck on just a very simple example .

i have a login button wich trigger  a caringorm event ; how can i disable this button during my command result and enable on finis.

i have walked through callback example http://www.gridlinked.info/cairngorm-secret-tip-3-responders-for-view-notifications/ but i dont understand it completely as it extends UMevent.

can anyone have better example or had any workaround on this senario?