Thank all, I read carefully all replies. Sent a request, then analyze a 
response to know the state of expiration date... Yeah,I think it is good idea. 
It help me control the date I want to expire and don't care about clock of user 
computer.

Are you have any simple example about it? I know about send one request to 
server, but how to receive response? Thank all of you very much

Hai Anh

--- In [email protected], "Kenneth Sutherland" 
<kenneth.sutherl...@...> wrote:
>
> Depending on what your app does, restricting its use, for example
> disable saving/loading/copying of text and similar are quite common
> features to make users upgrade.
> 
>  
> 
> Or what you could do is put in some code on startup that sent a request
> to your server to accept a response.  Only if the response was OK would
> the app run and not exit.  That way your beta version would expire on a
> set date and not from when a user had actually installed it.  You could
> also use the auto-update feature of AIR for this, once you wish you app
> to go from beta to release force the update on the user and then they
> need to enter a license key which they will get from yourself.
> 
>  
> 
> Kenneth.
> 
>  
> 
> From: [email protected] [mailto:[email protected]] On
> Behalf Of lehaianh1986
> Sent: 22 April 2009 04:03
> To: [email protected]
> Subject: [flexcoders] Expiration date
> 
>  
> 
> 
> 
> 
> 
> 
> Hi all, I have small AIR project, now it is beta version. I will send it
> to some testers. So, I want to write some code to set expired date for
> it. Example as set this soft to stop working 1 month from first use, or
> set the number of using soft is 100 times.
> 
> Any one can guide me some steps to do it? Thank in advanced
> 
> Hai Anh
> 
> 
> 
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