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    <p>Yes there is.</p> <p>In your dpr:</p> <pre><code>Application.CreateForm(TMyService, MyService); _ServiceInDebugMode := SysUtils.FindCmdLineSwitch('DEBUG', True); if _ServiceInDebugMode then DebugService(MyService) else SvcMgr.Application.Run; </code></pre> <p>DebugService is a procedure that creates a debug form, a service control thread and kicks off everything by calling Forms.Application.Run.</p> <p>You can compare the service control thread with the Windows' SCM (Service Control Manager), the debug form with an application that talks to the SCM (such as the services.msc) to start and stop services. The service should also have its own thread (service thread) to respond to control codes coming in from the SCM or our service control thread and one or many more separate threads to do its actual work. You want separate threads for the actual work (instead of coding it in the event handlers of your TService descendant) to ensure that the thread in which the TService itself runs is always free to respond to control codes from the SCM and you can still stop and start the service even when per chance a/the worker thread is frozen.</p> <p>This approach allows you to debug the service app code as well, but involves a fair amount of code and placing a couple of hooks into windows api functions to work properly. Too much to show here at short notice. Maybe I'll write it up in an article some day.</p> <p>In the mean time, if you don't want to code it all yourself you have two options. Either go with a library such as SVCOM or the one mentioned by Mick which do it all for you, or when in debug mode by-pass the service code all together and "simply" start your service as a "normal" forms application. You will have to disentangle the real functionality of your service from your TService descendant's code/event handlers, but that is something I'd recommend anyway for the reasons mentioned above.</p>
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    1. POHow to debug a windows service with Delphi?
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    1. USMarjan Venema
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    1. COI have the same app with forms and service. With forms it works. With services it doesn't work.
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      1. USDaniel Grillo
 

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