>>There is, so far as I can tell, no difference between PROCEDURE and FUNCTION except convention. Try this:
>
>Nancy, I agree with this. I could see no difference whether you declare something as a PROCEDURE or as a FUNCTION. So I usually declare everything as FUNCTION, whether there is a return value or not.

I think another convention seems to be using PROCEDURE for methods, whether or not they return values.

>
>Let's not forget, however, that there is a big difference dependent not on the way you declare your functions, but on the way you call them:
>
>MyFunction(par1, par2) will pass parameters by value.
>
>DO MyFunction with par1, par2 will pass parameters by reference.
>
>This is independent of whether you declared MyFunction as function or procedure.

By default, yes. Again, it's not difference in FUNCTION or PROCEDURE, as you point out.