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    <p>You can inheriting from TPersistent and then you can use the TJvAppXMLFileStorage (<a href="http://jvcl.delphi-jedi.org/" rel="nofollow noreferrer">JVCL</a>) component to serialize the TAlarm class.</p> <p><strong><em>Save a Object</em></strong></p> <pre><code>uses JvAppXMLStorage; Procedure SaveMyObject(MyAlarm : TAlarm) var MyStore: TJvAppXMLFileStorage; begin MyStore:= TJvAppXMLFileStorage.Create(nil); try MyStore.WritePersistent('', MyAlarm); MyStore.Xml.SaveToFile('C:\MyAlarm.xml'); finally MyStore.Free; end; end; </code></pre> <p><strong><em>Restore a Object</em></strong></p> <pre><code>uses JvAppXMLStorage; Procedure LoadMyObject(MyAlarm : TAlarm) var MyStore: TJvAppXMLFileStorage; begin MyStore:= TJvAppXMLFileStorage.Create(nil); try MyStore.FileName:='C:\MyAlarm.xml'; MyStore.Xml.LoadFromFile('C:\MyAlarm.xml'); MyStore.ReadPersistent('', MyAlarm); finally MyStore.Free; end; end; </code></pre> <h1>UPDATE</h1> <p>If you need to persist more than one object to the XML file you must assign a path (unique id) to the WritePersistent and ReadPersistent methods.</p> <p>See this example, </p> <p><strong><em>Multiple Persist</em></strong></p> <pre><code>Procedure SaveMyObjects(MyObjects : Array of TComponent); var MyStore: TJvAppXMLFileStorage; i : integer; begin MyStore:= TJvAppXMLFileStorage.Create(nil); try for i := Low(MyObjects) to High(MyObjects) do MyStore.WritePersistent(MyObjects[i].Name, MyObjects[i]); //In this case i use the name property of the component. MyStore.Xml.SaveToFile('C:\Tools\MyAlarm.xml'); finally MyStore.Free; end; end; </code></pre> <p>to save the components</p> <pre><code>SaveMyObjects([Button1,Button2,Edit1,Edit2]); </code></pre> <p><strong><em>Multiple LOAD</em></strong></p> <pre><code>Procedure LoadMyObjects(MyObjects:Array of TComponent); var MyStore : TJvAppXMLFileStorage; i : integer; begin MyStore:= TJvAppXMLFileStorage.Create(nil); try MyStore.FileName:='C:\Tools\MyAlarm.xml'; MyStore.Xml.LoadFromFile('C:\Tools\MyAlarm.xml'); for i := Low(MyObjects) to High(MyObjects) do MyStore.ReadPersistent(MyObjects[i].Name, MyObjects[i]); finally MyStore.Free; end; end; </code></pre> <p>To restore the properties</p> <pre><code>LoadMyObjects([Button1,Button2,Edit1,Edit2]); </code></pre> <p>Another option to load</p> <pre><code>Procedure LoadMyObjectById(Id:String;MyObject:TComponent); //using the id of the object var MyStore : TJvAppXMLFileStorage; i : integer; begin MyStore:= TJvAppXMLFileStorage.Create(nil); try MyStore.FileName:='C:\Tools\MyAlarm.xml'; MyStore.Xml.LoadFromFile('C:\Tools\MyAlarm.xml'); MyStore.ReadPersistent(id, MyObject); finally MyStore.Free; end; end; </code></pre> <p>you must run it this way</p> <pre><code>LoadMyObjectById(Button1.Name,Button1); //Again using the Name property. </code></pre> <p>I hope this example will be useful ;)</p>
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    1. COI see no code that assigns a new value to the `MyAlarm` arguments, so why are they passed by reference?
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    2. CORob you are right, in this case is not necessary to use VAR.
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    3. COOk, that's right... but what if I have to persist more than one object?? How to read more than one object from the XML???
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