How to compile in earlier versions using new keywords?

[Earthednet-wp]

Perhaps there is a way to have a text field that holds the appropriate script for the version, then you can set the script of btn xyz to fld "best script" on startup.
Bill

William Prothero
http://es.earthednet.org

> On Apr 9, 2016, at 6:11 AM, -hh <hh at livecode.org> wrote:
> 
> Is there a way to *compile* the following script in LC versions before 7?
> 
> on mouseUp
>  if char 1 of the version > 6 then
>     put trueword 1 of fld "IN" into fld "OUT"
>  else put word 1 of fld "IN" into fld "OUT"
> end mouseUp
> 
> The use of the try structure doesn't help, the script doesn't even
> *compile*. The same with "segment" and other new terms of LC 7/8.
> 
> More generaly, is there a way to "hide" some script blocks so that 
> the compilation in all earlier versions handles the block as comment? 
> 
> 
> 
> 
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