?
Solved

SendMessage to service application (delphi  7)

Posted on 2009-05-05
4
Medium Priority
?
2,243 Views
Last Modified: 2012-06-27
how can I send a message using SendMessage to a service application? it looks like the FindWindow doesnt find any window.

I dont want to use TCP/IP communication. I just need a quick way to send a short message without arguments to the service.
0
Comment
Question by:WebWolf1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 18

Expert Comment

by:Johnjces
ID: 24307054
Have a look at this Q still up on EE.

http://www.experts-exchange.com/Programming/Languages/Pascal/Delphi/Q_24376994.html

There is a link, I think, for SimpleIPC which uses FindWindow (source is included) that might help you and the entuire thread might be of assistance. Her is some of my info.....

If you do not want to use TCP/IP you could use mailslots which are not like email.

I have used them (mailslots) and they work just great.

You could also use a components called TssSimpleIPC from SunnisSoft. This uses WIndows Messaging (added via FindWindow).

http://www.sunisoft.com
http://www.torry.net/vcl/system/appscommunications/simpleipc.zip

It works very well in services and applications and it is free. Not sure what version of Delphi so could take some tweaking in newer versions.

John
0
 
LVL 18

Expert Comment

by:Johnjces
ID: 24307093
Added...

I must add that I have never used FIndWindow to "talk" to a service. I am pretty certain that you cannot talk to a service from an application using findwindow since a service does not have a window to find.

From service to application seems to work great for me and I had no problems in Vista either.

You will have to use a mailslot component. Look on torry or delphipages for mailslots.

John
0
 
LVL 12

Expert Comment

by:Hypo
ID: 24333464
If you for some reason can't send Windows messages to the service (like if the service don't have a window handle), then you could have your service create a named pipe, to which your other applications then can connect to and send messages. (I think this is quite a common way to communicate with services).
Rlibby (who is an expert in this forum), has created and published a vary good unit that can help you with pipe communication. To download, goto http://home.roadrunner.com/~rllibby/source.html, and get the file pipes.zip.

regards
Hypo
0
 

Accepted Solution

by:
WebWolf1 earned 0 total points
ID: 24365137
You are both wrong. FindWindow works well in services unless you know the class name.
I fixed it.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

752 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