questa è la unit 1
unit prova;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Menus;

type
TForm1 = class(TForm)
MainMenu1: TMainMenu;
File1: TMenuItem;
Inserisci1: TMenuItem;
procedure Inserisci1Click(Sender: TObject);

private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;


implementation

{$R *.dfm}




procedure TForm1.Inserisci1Click(Sender: TObject);
begin
TForm2.Show;
end;

end.
questa è la unit 2(dove c'è il form che voglio aprire
unit Unit2;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, ADODB, StdCtrls;

type
TForm2 = class(TForm)
Label1: TLabel;
Edit1: TEdit;
Button1: TButton;
ADOConnection1: TADOConnection;
ADODataSet1: TADODataSet;
ADOTable1: TADOTable;
DataSource1: TDataSource;
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form2: TForm2;

implementation

{$R *.dfm}

end.