topic Difference between MACRO & SUBROUTINE in Application Development and Automation Discussions

Difference between MACRO & SUBROUTINE

Former Member — Wed, 19 Dec 2007 16:54:11 GMT

Hi,

What is the difference between MACRO & a SUBROUTINE?

Regards,

Amruth

Re: Difference between MACRO & SUBROUTINE

former_member156446 — Wed, 19 Dec 2007 16:55:37 GMT

Macros can only be used in the program the are defined in and only after the definition are expanded at compilation / generation. Subroutines (FORM) can be called from both the program the are defined in and other programs . A MACRO is more or less an abbreviation for some lines of code that are used more than once or twice. A FORM is a local subroutine (which can be called external). A FUNCTION is (more or less) a subroutine that is called external. Since debugging a MACRO is not really possible, prevent the use of them (I’ve never used them, but seen them in action). If the subroutine is used only local (called internal) use a FORM. If the subroutine is called external (used by more than one program) use a FUNCTION.

Re: Difference between MACRO & SUBROUTINE

Former Member — Wed, 19 Dec 2007 16:56:49 GMT

Hi Amruth,

Macro

Macros can only be used in the program that are defined in and only after the definition are expanded at compilation/generation.

*Subroutine *

Subroutines (FORM) can be called from both the program that are defined in & other programs.

A MACRO is more or less an abbrevation for some lines of code that are used more than once or twice.

A FORM is a local subroutine(which can be called external). A FUNCTION is(more or less) a subroutine that is called external.

Since debugging a MACRO is not really possbile, prevent the use if them(I've never used them, but seen them in action).

If the subroutine is used only local(called internal) use FORM. If the subroutine is called external(used by more than one program) use a FUNCTION.

Regards,

Chandru

Re: Difference between MACRO & SUBROUTINE

matt — Wed, 19 Dec 2007 17:19:40 GMT

There are macros which are defined globally - specifically in the HR module.

matt