Solved

Passing data between two Windows Apps - ActiveX or DDE?

Posted on 2004-09-27
4
643 Views
Last Modified: 2013-11-20
Hi there,

I am facing a challenge to decide which tech is good for passing data between two windows applications (for Win2k).  - ActiveX automation or DDE?

It would be greatly appreciated if someone gives me an ActiveX (or DDE?) sample/Link to a simple sample to show how the server and client apps are implemented to exchange data.

XWL
0
Comment
Question by:XWL
4 Comments
 
LVL 48

Expert Comment

by:AlexFM
ID: 12158356
0
 
LVL 6

Expert Comment

by:Amritpal Singh
ID: 12158487
plz have a look at the following link
http://www.funducode.com/comdcom.asp
i hope it'll be of any help
0
 

Accepted Solution

by:
MartinSGill earned 250 total points
ID: 12158840
It depends really on what you plan to pass around.

There are 3 basic methods two of which have already been outlined.

1) COM
2) Windows Messages
3) Shared Memory

If you just want to send a trigger to another window, then windows messages are your best bet.
Adv: Nice and easy to implement, but no really data that you can pass.

COM gives you protatbility and expandability. It allows any app to communicate with your application. The disadvantage is the COM in c++ is not that easy, even with ATL, and you'll have a steep learning curve.

Shared memory has teh advantage that it's really fast. The thing you need to be careful of though is parrallel access, so you will need to lock access to it with mutextes, simple critical sections won't work, as the access is by different processes.

Shared memory requires you to reserve enough system memory for the largest piece of data you will ever send (unless you use shard files, but that's very slow) and hence taking up system resources for the whole time your application is running.

COM will also allow you to exchange data between apps over the network, if taht is a possible future scenario then COM is the one to go for.

You must decide exactly what you need to pass and how it needs to be passed to decide which method suits you best.
0
 
LVL 5

Expert Comment

by:info_expert
ID: 12160773
Hi,


Ok if you need to use client server cummunication or so, then use sockets.
Believe me, its really simple , by reading johnnie's windows sockets tutorial,
follow this unique link:

http://www.hal-pc.org/~johnnie2/winsock.html


If you want most of the work done for you then better look for the library libwww at www.w3.org/Library/



Regards.
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
xyBalance chalenge 58 93
fizzArray  challenge 1 81
sumHeights  challenge 17 70
Path of Workbook 3 74
Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

9 Experts available now in Live!

Get 1:1 Help Now