testsemf.pas

来自「Delphi高级开发指南是开发程序的好帮手」· PAS 代码 · 共 45 行

unit TestSemF;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ExtCtrls, StdCtrls, DdhSemap;

type
  TForm1 = class(TForm)
    DDHSemaphore1: TDDHSemaphore;
    CheckBox1: TCheckBox;
    procedure DDHSemaphore1GreenClick(Sender: TObject;
      var Active: Boolean);
    procedure CheckBox1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.DDHSemaphore1GreenClick(Sender: TObject;
  var Active: Boolean);
begin
  Active := True;
  CheckBox1.Checked := False;
end;

procedure TForm1.CheckBox1Click(Sender: TObject);
begin
  if CheckBox1.Checked then
    DDHSemaphore1.SemState := scPulse
  else
    DDHSemaphore1.SemState := scOff;
end;

end.