Get a value after the call (*solved*)

[Sinclair]

Is there any way that a program in ZX BASIC returns a value?

That I need is, once end my program this return a value to the +3 BASIC as in the following example:

Code:

10 LOAD "program.bin" CODE 32768
20 LET r =  USR 32768
30 PRINT r

Simply this

Thank you.