Hi Conor, Thanks
Regards Leigh -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Conor Boyd Sent: Tuesday, 8 May 2007 11:04 a.m. To: NZ Borland Developers Group - Delphi List Subject: RE: [DUG] Sending data between process on same computer on windows I've already given you one scenario (although I admit it's not one that's going to bother most people), and couldn't find any doco anywhere to describe why Send/PostMessage failed in that instance. Another scenario was described on the page I linked to: "The easiest way to do such IPC (inter process communication) is to use the message APIs like FindWindow + PostMessage. Unfortunately messages may not work inside of non interactive service/system processes in the NT family." C. ---------------------------------------------------------------------------- -- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Leigh Wanstead May I ask why sendmessage is not reliable? In what situation will cause sendmessage fail to break the communication? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Myles Penlington 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. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Conor Boyd 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 ---------------------------------------------------------------------------- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Leigh Wanstead May I ask which is faster, ipc or sendmessage? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 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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