Daten an zu Laufzeit erzeugte Form übergeben.

[codenoob]

Hab das nun so gelöst

Delphi-Quellcode:

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Buttons, Vcl.ComCtrls, Unit2;

type
  TForm1 = class(TForm)
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    ListView1: TListView;
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
  MyForm: TForm2;

implementation

{$R *.dfm}

function FindForm(H: THandle): TForm;
var
  i: integer;
begin
  Result := nil;
  for i := 0 to Screen.FormCount -1 do begin
    if Screen.Forms[i].Handle = H then Result := Screen.Forms[i];
  end;
end;

procedure TForm1.BitBtn1Click(Sender: TObject);
var
 Li: TListItem;
begin
MyForm := TForm2.Create(nil);
MyForm.Caption := inttostr(MyForm.Handle);

Li := Form1.ListView1.Items.Add;
Li.Caption := inttostr(MyForm.Handle);

MyForm.Show;
end;

procedure TForm1.BitBtn2Click(Sender: TObject);
begin
myform := TForm2(FindForm(strtoint(listview1.Selected.Caption)));
myform.Label1.Caption := 'Hallo Welt';
end;

end.