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copied!<p>I usually create my application in such a way that it can be started as a service or as a GUI, via a commandline switch <code>/GUI</code>.</p> <p>When the application runs with a GUI, I instantiate and start the service class "manually". </p> <p>Advantages:</p> <ul> <li><p>It'll run the same code, making it very easy to debug the service. You can just put breakpoints and step through your code without having to "attach" to a running application. </p></li> <li><p>Because of the GUI, you can see what your service would be doing, and interact with it, via listviews and buttons, even on remote servers where you don't have a debugger. Having to interact with your service via logs and configurations is crappy and slow.</p></li> </ul> <p>Example dpr, from a project that works like this:</p> <pre><code>program xxxx; uses SysUtils, SvcMgr, .......; {$R *.res} begin GlobalAppId := 1; MapMatcherController := TMapMatcherController.Create(nil); try if FindCmdLineSwitch('GUI',['/','-'],True) then begin Forms.Application.Initialize; Forms.Application.MainFormOnTaskbar := True; Forms.Application.CreateForm(TfrmMain, frmMain); Forms.Application.Run; end else begin SvcMgr.Application.Initialize; SvcMgr.Application.CreateForm(TsrvMapMatcher2, srvMapMatcher2); SvcMgr.Application.Run; end; finally MapMatcherController.Free; end; end. </code></pre> <p>Oh, another thing to keep in mind is that services usually run as a "system" user, which means you'll have different privileges and settings (for example drive letter mappings).</p>

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