I explain better my question...if i declare functions before there call, i have noticed that the code is executed sequentially from the first step of the script to the end without taking care of the function definition.
Below the example of function declaration\use.
line 1 : sub pippo(param)
line 20: end sub
line 100: call pippo(param);
The code is executed from the first line to the 100 line without taking care of this. And if a will declare at contrary shall the code stop at the end of the function definitio or not?