In most cases, programs will work if application 
standards were followed.  If the programmer chose to
do obscure calls to little used API's in their
program, then they run the risk of having
problems in the future.

Upgrading software is a fact of life and will
eventually be required sometime in the future.
The best we can do is try to minimize the
risk of failure in the future.

Cardyin

---------------------------------------
Cardyin Kim
Client/Server & Web Development Analyst
Information Services
San Antonio Community Hospital
ckim@s...     (xxx)xxx-xxxx     
---------------------------------------


-----Original Message-----
From: Sudhir [mailto:skwrox@y...]
Sent: Wednesday, November 28, 2001 12:20 PM
To: professional vb
Subject: [pro_vb] RE: Version incompatibility fears!


Ok. Thanks, Cardyin. Atleast that saves me from
getting the client mad at me. 

Well, isn't there any solution to this kind of a
situation? I can immagine such a situation ocurring
quite easily in everyday life! Or do I have to write
this new app in Java, and put VB aside?

Sudhir

--- "Kim, Cardyin" <CKim@s...> wrote:
> Sudhir,
> 
>    Yes, they will upgrade the controls.
> Depending on how the programs were coded
> they may or may not work.
> 
> Cardyin
> 
> ---------------------------------------
> Cardyin Kim
> Client/Server & Web Development Analyst
> Information Services
> San Antonio Community Hospital
> ckim@s...     (xxx)xxx-xxxx     
> ---------------------------------------
> 
> 
> -----Original Message-----
> From: Sudhir [mailto:skwrox@y...]
> Sent: Wednesday, November 28, 2001 9:42 AM
> To: professional vb
> Subject: [pro_vb] RE: Version incompatibility fears!
> 
> 
> Hi Cardyin, 
> 
> Thanks for your help. In my situation, I don't have
> the source code for the VB-4 & 5 applications that
> the
> users are using. Those apps were not written by me.
> And those are working fine. So I don't need to
> upgrade
> those applications. Nor can I execute them in VB-6
> environment to verify that they work.
> 
> My question is: when I install a new application
> written in VB-6 on the user's machine, will my new
> installation upgrade the existing controlls (that
> were
> already installed by the VB-4 & 5 applications, and
> are being used,) and make them unavailable to those
> older applications?
> 
> Thanks,
> Sudhir
> 
> 
> 
> --- "Kim, Cardyin" <CKim@s...> wrote:
> > Sudhir,
> > 
> >    You may experience some incompatibility issues
> > between VB 4 and VB 6 depending on what controls
> > you use and what coding conventions you use.  
> > In most cases the executable will still work,
> > but if you happen to need to modify the code in VB
> > 6.0
> > you will have to update lot of the older code in
> > order
> > to get the program to compile a function version 
> > of your application.  My suggestion would be to
> try
> > and execute VB 4.0 programs on your VB 6.0
> > development
> > machine. 
> > 
> >   In the 90+, VB applications that I have migrated
> > from
> > VB 5 to VB 6 at this one shop, none of the
> programs 
> > had an issue with any of the new controls.  Some
> of
> > the
> > older properties and methods of different controls
> > were "hidden" in the newer version of the controls
> > to maintain backwards compatibility.  This means
> > that if you have code that refers to the hidden
> > methods, they will still work, but in any future
> > coding you do, the methods will not readily
> > appear in your intellesense pop up windows.
> > 
> > Hope this helps you.
> > 
> > Cardyin
> > 
> > ---------------------------------------
> > Cardyin Kim
> > Client/Server & Web Development Analyst
> > Information Services
> > San Antonio Community Hospital
> > ckim@s...     (xxx)xxx-xxxx     
> > ---------------------------------------
> > 
> > 
> > -----Original Message-----
> > From: Sudhir [mailto:skwrox@y...]
> > Sent: Wednesday, November 28, 2001 7:50 AM
> > To: professional vb
> > Subject: [pro_vb] Version incompatibility fears!
> > 
> > 
> > Hi all,
> > 
> > I want to issue a simple VB application (.exe,
> SDI)
> > to
> > users who know nothing about programming. They
> > already
> > have a few other VB applications that were written
> > in
> > VB-4 or 5. I am using VB-6.
> > 
> > My question is: when I install this application,
> > will
> > it replace the common controls (like Textbox,
> grids,
> > etc.) on the client's machines? If it does, I
> > suppose
> > their applications will not be able to work with
> the
> > VB-6 controls, right? Or am I wrong?
> > 
> > Please advise if my fears are valid, and what I
> can
> > do
> > to prevent the problem.
> > 
> > Thanks in advance,
> > Sudhir
> > 
> > 
> > 
> > __________________________________________________
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