Delphi

Certainly! Below is an example of how to write and display “Hello World!” in Delphi using a form with a button:

unit HelloWorldForm;

interface

uses
  Winapi.Windows, Winapi.Messages,
  System.SysUtils, System.Variants, System.Classes,
  Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage('Hello World!');
end;

end.

Explanation:

• TForm1: This is the form where your application’s UI will be created. It inherits from TForm.
• Button1: A button component on the form that users can click to display a message box with “Hello World!” when clicked.
• procedure Button1Click(Sender: TObject): This event handler is triggered when the user clicks the button. The ShowMessage procedure displays a message box with the specified text.

Steps to Implement:

1. Open Delphi IDE (RAD Studio).
2. Create a new VCL Forms Application project.
3. In the Object Inspector, drag and drop a TButton component onto your form.
4. Double-click on the button to automatically generate the event handler code for its click event.
5. Replace the generated method body with the provided Button1Click procedure.
6. Run the application; clicking the button should display “Hello World!” in a message box.

This is a simple example, but it demonstrates how you can create interactive applications using Delphi’s form-based programming capabilities.

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