[DUG] Sending data between process on same computer on windows

[Leigh Wanstead]

May I ask why sendmessage is not reliable? In what situation will cause
sendmessage fail to break the communication?

TIA

Leigh
  -----Original Message-----
  From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]On
Behalf Of Myles Penlington
  Sent: Tuesday, 8 May 2007 10:29 a.m.
  To: NZ Borland Developers Group - Delphi List
  Subject: RE: [DUG] Sending data between process on same computer on
windows


  The devil is in the detail in this kind of stuff, and your actual
implementation can have a great effect.

  As implied, the best method will be to develop 2 or 3 different methods,
test and compare the results.



  Myles.





  From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]
On Behalf Of Conor Boyd
  Sent: Tuesday, 8 May 2007 10:19
  To: NZ Borland Developers Group - Delphi List
  Subject: RE: [DUG] Sending data between process on same computer on
windows



  Sorry Leigh, I haven't done enough testing with big volume messages to be
able to answer that for you.



  I was more interested in something that worked and was reliable.



  Cheers,



  Conor




----------------------------------------------------------------------------
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  From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]
On Behalf Of Leigh Wanstead


  May I ask which is faster, ipc or sendmessage?

    -----Original Message-----
    From: delphi-bounces at delphi.org.nz
[mailto:delphi-bounces at delphi.org.nz]On Behalf Of Conor Boyd


    I found the IPC functionality from madshi.net
(http://help.madshi.net/IPC.htm) to work very nicely.



    I needed a way to send messages from a screensaver I was writing to
another process on the same box, and SendMessage didn't seem to work when a
screensaver was active (which I found strange, but anyway...), and the IPC
stuff from madshi works flawlessly.




----------------------------------------------------------------------------

    From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]
On Behalf Of Leigh Wanstead


    May I ask what is the fastest way to send data between process on same
computer on windows? I assume sendmessage api faster than semaphore waiting,
of course faster than TCP/IP which will go through huge amounts of tcp/ip
stack. I just want lowest overhead on per call. Anyone have any experiences
on that?

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