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Ron
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 Posted: Wed Nov 22, 2006 9:40 pm Post subject: Communicating between a Service and a regular Window program |
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Is there anyway to post a message from a service to a regular
windows application? How about a broadcast message?
unsigned long MyDisconnectMessage = RegisterWindowMessage("test message");
::SendMessage(HWND_BROADCAST, MyDisconnectMessage, 0, 0);
This does not seem to work. I am guessing because it comes from a service. Is there anyone to do what I'm trying to do? |
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Remy Lebeau (TeamB)
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| Posted: Thu Nov 23, 2006 12:14 am Post subject: Re: Communicating between a Service and a regular Window pro |
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"Ron" <win8128 (AT) aol (DOT) com> wrote in message
news:45647d62$1 (AT) newsgroups (DOT) borland.com...
| Quote: | Is there anyway to post a message from a service to a
regular windows application?
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Not reliably. If the service is not running in the same workstation/desktop
as the application, then you cannot use window messages at all, as they
cannot pass over desktop boundaries.
You would be better off using named pipes or TCP/IP sockets instead.
Gambit |
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Ron Sawyer
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| Posted: Fri Nov 24, 2006 10:43 pm Post subject: Re: Communicating between a Service and a regular Window pro |
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Thanks! It would have to span desktop boundaries. I originally was using
TCP/IP, but my original design was poor and I was overloading the processor.
(I was polling the the service and believe now that I will have to do a push
from the service rather than a pull.) A post message would have been really
easy, but I think I have it worked out in my head how I want to do what
needs to be done.
Thanks for the response (as always you are a fount of information) and happy
Holidays. |
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Remy Lebeau (TeamB)
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| Posted: Sat Nov 25, 2006 7:50 am Post subject: Re: Communicating between a Service and a regular Window pro |
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"Ron Sawyer" <XXXRSAWYER8128XQQXX (AT) aol (DOT) com> wrote in message
news:4567212f$1 (AT) newsgroups (DOT) borland.com...
| Quote: | Thanks! It would have to span desktop boundaries.
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Then you cannot use window messages for your communication.
| Quote: | I originally was using TCP/IP, but my original design was poor and
I was overloading the processor. I was polling the the service
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What exactly were you polling?
| Quote: | believe now that I will have to do a push from the service rather than a
pull. |
That depends on how the client application is using the socket. If the
application is using a blocking socket, then the client will have to poll
the socket anyway. But polling a socket should not be pegging the CPU usage
in either case, unless you were polling way too often, and not using
efficient waiting methods.
Gambit |
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Ron Sawyer
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| Posted: Tue Nov 28, 2006 4:55 am Post subject: Re: Communicating between a Service and a regular Window pro |
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The better method is the push - which is working now. The reason I didn't
originally use it was because I couldn't see how to use the specific Socket
VCL that I was using in non-blocking mode. I am now using a different VCL
which allows for non-blocking and everything is moving smoothly. |
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Remy Lebeau (TeamB)
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| Posted: Tue Nov 28, 2006 5:36 am Post subject: Re: Communicating between a Service and a regular Window pro |
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"Ron Sawyer" <XXXRSAWYER8128XQQXX (AT) aol (DOT) com> wrote in message
news:456b6ccf$1 (AT) newsgroups (DOT) borland.com...
| Quote: | I couldn't see how to use the specific Socket VCL that I was using
in non-blocking mode.
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What were you having a problem with?
Gambit |
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