调用窗口问题

Question

建了FROM1和FORM2,调用FORM2出现unit1.pas(51):Undeclared identifier:'Form2'
                              Project1.dpr(6):Could not compile used unit'Unit1.pas'代码如下:
unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, jpeg, ExtCtrls;type
  TForm1 = class(TForm)
    Image1: TImage;
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    RadioButton3: TRadioButton;
    Button1: TButton;
    Image2: TImage;
    Label3: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Label3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  Form1: TForm1;
implementation{$R *.dfm}procedure TForm1.FormCreate(Sender: TObject);
begin
form1.Color:=rgb(8,190,255);
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  showmessage('测试程序');
end;procedure TForm1.Label3Click(Sender: TObject);
begin
  Form2.show;
end;end.

Answer 1

如果你的Form2的单元名称是 Unit2.pasunit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, jpeg, ExtCtrls;type
  TForm1 = class(TForm)
  Image1: TImage;
  Label1: TLabel;
  Label2: TLabel;
  Edit1: TEdit;
  Edit2: TEdit;
  RadioButton1: TRadioButton;
  RadioButton2: TRadioButton;
  RadioButton3: TRadioButton;
  Button1: TButton;
  Image2: TImage;
  Label3: TLabel;
  procedure FormCreate(Sender: TObject);
  procedure Button1Click(Sender: TObject);
  procedure Label3Click(Sender: TObject);
  private
  { Private declarations }
  public
  { Public declarations }
  end;var
  Form1: TForm1;
implementationuses Unit2;  //这里加上你要引用的单元名称{$R *.dfm}procedure TForm1.FormCreate(Sender: TObject);
begin
form1.Color:=rgb(8,190,255);
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  showmessage('测试程序');
end;procedure TForm1.Label3Click(Sender: TObject);
begin
  Form2.show;
end;end.

Answer 2

在implementation后面加上uses Unit2