Depends on what you want to do.  I assume the trial version is a limited 
version of your real product.

Some people use a registration code mechanism.  Without the registration 
code, the program has some locked-out functionality, and there is often 
some time limit before the program cannot be used (or gets even more 
limited functionality).  Others build separate trial-versus-full versions, 
with or without time limits.  A third way is to do some kind of "nag-ware" 
scheme.

I don't recommend having the application uninstall once it's expired, but 
doing a lock-out is easy enough.  Just check to see if the lock-out 
conditions have been satisfied (say, you keep a timestamp in the app's 
preferences and check it on start-up).  You can also keep the registration 
code in there as well.  The usual trick is to have a reg code based on the 
Hotsync ID, but there are other schemes available.

At 12:02 AM 9/22/2002 -0700, deven sharma wrote:
 > hi all.
 > please help me if
 > we can create palm applications which are trial
 > versions of the real product and how do we uninstall
 > or disable the application once the trial period is
 > over.?


----
Tom Frauenhofer, [EMAIL PROTECTED]
http://www.beret.com



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