How can I do service application in Delphi

To create a service application in Delphi, you can use the TService component from the Vcl.SvcMgr unit. A service application is a special type of program that runs in the background and performs tasks without user interaction.

Here is a general outline of the steps you can follow to create a service application in Delphi:

Create a new VCL service application using the File > New > Other > Service Application option in the Delphi IDE. This will create a new project with a default TService component and a main form.
Double-click on the TService component in the form designer to open the Service Editor. In the Service Editor, you can specify the name and display name of the service, as well as any other relevant properties.
Implement the service logic in the OnExecute event handler of the TService component. This event is called when the service is started and is used to perform the tasks that the service is designed to do.
Implement any additional event handlers as needed, such as the OnStart and OnStop event handlers to handle service start and stop requests.
Build and install the service using the Run > Install Service menu option in the Delphi IDE. This will register the service with the operating system and make it available to be started and stopped through the Services Manager.

Here is an example of how you might implement a simple service application in Delphi that writes a message to a log file every minute:

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.SvcMgr, Vcl.Dialogs;

type
  TMyService = class(TService)
    procedure ServiceExecute(Sender: TService);
  private
    { Private declarations }
  public
    function GetServiceController: TServiceController; override;
  end;

var
  MyService: TMyService;

procedure ServiceController(CtrlCode: DWord); stdcall;
begin
  MyService.Controller(CtrlCode);
end;

function TMyService.GetServiceController: TServiceController;
begin
  Result := ServiceController;
end;

uses

Winapi.Windows, Winapi.Messages, System.SysUtils, System.Classes, Vcl.Graphics,

Vcl.Controls, Vcl.SvcMgr, Vcl.Dialogs;

type

TMyService = class(TService)

procedure ServiceExecute(Sender: TService);

private

{ Private declarations }

public

function GetServiceController: TServiceController; override;

end;

var

MyService: TMyService;

procedure ServiceController(CtrlCode: DWord); stdcall;

begin

MyService.Controller(CtrlCode);

end;

function TMyService.GetServiceController: TServiceController;

begin

Result := ServiceController;

end;

How can I do service application in Delphi

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