Delphi VCL

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Delphi

SecondF.pas：Code Content

							unit SecondF;
interface
uses
  SysUtils, Windows, Messages, Classes,
  Graphics, Controls, Forms, Dialogs, StdCtrls;
type
  TSecondForm = class(TForm)
    CloseButton: TButton;
    procedure CloseButtonClick(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  SecondForm: TSecondForm;
implementation
{$R *.DFM}
uses
  ScreenF;
procedure TSecondForm.CloseButtonClick(Sender: TObject);
begin
  Close;
end;
procedure TSecondForm.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
  {actually delete the form}
  Action := caFree;
end;
procedure TSecondForm.FormDestroy(Sender: TObject);
begin
  {post a message to the main form, but only if it is
  not closing, to avoid a GPFault}
  if not (csDestroying in MainForm.ComponentState) then
    PostMessage (MainForm.Handle, wm_User, 0, 0);
end;
end.

						