BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  ocx vs service          BorlandTalk.com Forum Index -> Delphi Non-Technical View previous topic :: View next topic   Author Message Brad White Guest Posted: Tue Aug 23, 2005 4:26 pm    Post subject: ocx vs service We have an app that uses an OCX and processes some images in our database. It kicks off the OCX and runs fine. We've run it more than 100 times with no problems. We moved it into a service to listen to TCP requests and started having problems. Usually in less than 5 runs it would start failing. The OCX would kick off, but would return all 0's for data. Once it failed, it never started working correctly again until restarting the service. Support for the OCX replied, "Oh, did you say service? We don't support running in a service." We couldn't think of anything else, so we had our service spawn an exe and wait. I didn't expect it to work. The standalone console app that gets spawned off should inherit all the problems that the service had. But it does work. It has run well over 150 times with no hint of problems. Any idea what would be different about a service? Everything is a similar as we could make it. The service and the exe are both running as SYSTEM. Both are located in System32. -- Brad. Vote for CodeRush in future versions of Delphi http://qc.borland.com/wc/wc.exe/details?reportid=9138 Back to top Craig Stuntz [TeamB] Guest Posted: Tue Aug 23, 2005 5:11 pm    Post subject: Re: ocx vs service Brad White wrote: Quote: Any idea what would be different about a service? Everything is a similar as we could make it. The service and the exe are both running as SYSTEM. Both are located in System32. Threading? What threading model do you specify in your call to CoInitializeEx in your service? Another possibility is that the OCX somehow is dependent on the GUI. You can test this by allowing your service to interact with the desktop, but I would *not* recommend this for production software, as it's a security problem. -- Craig Stuntz [TeamB] . Vertex Systems Corp. . Columbus, OH Delphi/InterBase Weblog : http://blogs.teamb.com/craigstuntz All the great TeamB service you've come to expect plus (New!) Irish Tin Whistle tips: http://learningtowhistle.blogspot.com Back to top Brad White Guest Posted: Tue Aug 23, 2005 11:51 pm    Post subject: Re: ocx vs service "Craig Stuntz [TeamB]" <craig_stuntz (AT) nospam (DOT) please [a.k.a. acm.org]> wrote in message news:430b58c4$1 (AT) newsgroups (DOT) borland.com... Quote: Brad White wrote: Any idea what would be different about a service? Everything is a similar as we could make it. The service and the exe are both running as SYSTEM. Both are located in System32. Threading? What threading model do you specify in your call to CoInitializeEx in your service? We are calling CoInitialize. MSDN says that it calls Ex with an ApartmentThreading flag. Does that make a difference? -- Brad. Vote for CodeRush in future versions of Delphi http://qc.borland.com/wc/wc.exe/details?reportid=9138 Back to top Craig Stuntz [TeamB] Guest Posted: Thu Aug 25, 2005 7:47 pm    Post subject: Re: ocx vs service Brad White wrote: Quote: We are calling CoInitialize. MSDN says that it calls Ex with an ApartmentThreading flag. Does that make a difference? Not AFAIK. Try the GUI test (interact with desktop). -- Craig Stuntz [TeamB] . Vertex Systems Corp. . 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