unit Unit1;
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
{$R *.dfm}
uses Unit2;
function FormExists(MyForm: TObject): boolean;
var i: Integer;
begin
Result := False;
for i := 0 to Application.ComponentCount-1 do
if Application.Components[i] = MyForm then begin
Result := True;
Break;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
if FormExists(Form2) = False then
begin
try
Application.CreateForm(TForm2, Form2);
finally
Form2.Show;
end;
end;
end;
end.
unit Unit2;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs;
type
TForm2 = class(TForm)
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form2: TForm2;
implementation
{$R *.dfm}
procedure TForm2.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Destroy;
end;
end.