Procedure vs Sub

[larrybtoys]

Is there any difference / operation between using:

Procedure
    (code)
EndProcedure 

vs 

Pro
    (code)
EndPro

[(X)]

Mar 7, 2024 12:09:19 GMT 1 larrybtoys said:

Is there any difference / operation between using:

Pro
    (code)
EndPro

As far as I know 'Proc' is completely equivalent to 'Procedure'

To be 'picky', the above code will give an error in the editor, this should work:

Proc P()
// (code)
EndProc

---

Re: Procedure vs Sub

I've written my own subroutines using either Proc or Sub without issue so far, but, there may be default behaviour that might make a difference under the right conditions.

From Help Doc...

Procedures: A Procedure, or general procedure, is a structure which tells the application how to perform a specific task and these form the main building blocks of the computational part of the program. Once a general procedure is defined, it must be specifically invoked by the application.

Subs: A Sub, though similar to a Procedure, is designed to be an event procedure. This type of code usually has fixed parameters or arguments and, once defined, lies dormant until called upon to respond to events caused by the user or triggered by the system.
Subs can also be used for porting VB sub routines and for this reason the default variable type of parameters is Variant; it is also possible to use Subs in a similar way to Procedures, although care should be taken due to the different default method of passing parameters (see below).

So, you can write your own Sub or Proc but GB32 Events will only respond to a specificly configured Sub.

For example:

Sub frm1_MouseDown(Button&, Shift&, x!, y!)