为什么我编译不了exe程序？
提示这个：
[Error] Project1.dpr(5): Declaration expected but identifier 'Unit1' found
[Error] Project1.dpr(20): Undeclared identifier: 'TForm1'
我的项目代码：

Delphi(Pascal) code

program Project1;uses  Forms,windows;  Unit1 in 'Unit1.pas' {Form1};{$R *.res} const      ClassName='Tform1'; var      Handle:integer; begin  handle:=findwindow(classname,nil);    if handle<>0 then     begin    messagebox(0,'请不要重复启动！','运行',0);   exit;   end;  Application.Initialize;  Application.CreateForm(TForm1, Form1);  Application.Run;end.

Delphi(Pascal) code

program Project1;uses  Forms,windows,    //这里是逗号吧！  Unit1 in 'Unit1.pas' {Form1};