>Is there any difference in Procedure or Function in a program?

There is no difference in the two keywords PROCEDURE and FUNCTION.

There are difference in behavior based on how you call a routine.

DO MyProcedure

Is calling a procedure while;

MyProcedure()

Is calling a function.

A function has parameters passed by value by defualt while a procedure gets its prarmeters passed by reference by default.

A DO Whatever call does not return any value while a Whatever() call does return a value (.T. by default).

You can read the help fiel to see how to pass parameters other than by the default method for each type of call.