Delphi实现登录窗体与主窗体的过程

登录窗体：

type
  TfrmLogin = class(TForm)
    btn1: TButton;
    procedure btn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmLogin: TfrmLogin;

implementation

{$R *.dfm}

procedure TfrmLogin.btn1Click(Sender: TObject);
begin
  //登录逻辑
  //......
  //登录成功后
  Self.Hint := 'SUCCESS';
  Self.Close;
end;

main窗体：略。。。

项目：

program Project2;

uses
  Vcl.Forms,
  main in 'main.pas' {frmMain},
  login in 'login.pas' {frmLogin};

{$R *.res}

begin
  Application.Initialize;
  Application.MainFormOnTaskbar := True;
  ReportMemoryLeaksOnShutdown := True;
  frmLogin := TfrmLogin.Create(nil);
  frmLogin.ShowModal;
  if frmLogin.Hint = 'SUCCESS' then
  begin
    frmLogin.Free;
    Application.CreateForm(TfrmMain, frmMain);
    Application.Run;
  end else begin
    frmLogin.Free;
    Application.Terminate;
  end;

end.