ajmpereira,
There is a function called isnumber that will return true if the string is actually a number. For example, if you put this in a PressTalk:
if(isnumber('3.1416'))
show('This is a number.')
else()
show('NOT A NUMBER')
endif()
It will display 'This is a number.'.
You could also use it as an object's condition. For example, putting this in an object's condition:
=isnumber(@(1,1,10))
Would make the object show up only if the text on line 1 between columns 1 and 10 would be a number.
Hope that helps!
Regards,
Rapha