BDE Callback for Paradox tables

Anyone know how to use DbiRegisterCallBack to tell when a table has been edited?  I have Delphi applications that share a Paradox database on a network and I want each application running on a different machine to know when certain tables in the database are updated so I can update the application's display.  I only care about a few of the tables, not all of them.  I tried a dbiRegisterCallback and then went into Database Desktop and edited a record in a table and nothing happend.  Here is the code of my test application:

{Our callback  function}
function DbiCbFn(ecbType     : CBType;
                 iClientData : Longint;
                 CbInfo      : pointer): CBRType stdcall;
var
  s : string;
begin
  showmessage('Callback succeeded!');
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
 {Make sure the table we are moving from is open}
  Table1.Open;
 {register our callback}
  DbiRegisterCallBack(table1.handle,
                      cbTABLECHANGED,
                      0,
                      0,
                      nil,
                      @DbiCbFn);


end;

Note: I am using Delphi 2 with BDE 3.5 for this application.
I can upgrade to BDE 4.0 if necessary but not Delphi 3.
pswensonAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

pswensonAuthor Commented:
Adjusted points to 75
0
ZifNabCommented:
Borland has an example of this.

piece of support page :

Example 2: Register the cbTABLECHAGNED callback for notification when a Paradox table's data has changed

This example is too complicated to be shown here. A sample Delphi registration component with an example is available that will do all the registration work for you. Simply install the new TTable component (TRegisterTable in RegisterTable.pas) and compile the included project. This component will work with all table types, but will only use the callback with Paradox table types.

You can go to this page:

http://www.borland.com/devsupport/bde/bdeapiex/dbiregistercallback.html

Or you can download the example zip-file from :

http://www.borland.com/devsupport/bde/files/tablechanged.zip

Have fun,
c.u. ZifNab;
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.