Hi Luciano
I'll attempt question 1 and leave the other questions to others.

> 1 - The manual says:
> "Then you can use the following sequences in PowerPro strings.
> [...]
> \&      expression follows character (replace & by whatever character you use)"

That means:
If \ is your escape char and & is your expression char
then \& will escape the &, so the & is sent literally
instead of acting as your expression follows char.

var1="stuff"
message &(var1) ;; sends: stuff
message \&(var1) ;; sends: &(var1)

When it says "(replace & by whatever character you use)"
it just means if your expression follows char is something else
such as ~, then \~(var1) would send a literal: ~(var1)
instead of sending the resolved value of var1.
_________________________________

So the escape char does two opposite things: it turns some
non-special characters into special chars, such as: \n
and it turns any special chars into non-special chars.



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