exthan0.pas

delphi RS232 计算机串口通讯源程序

(***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is TurboPower Async Professional
 *
 * The Initial Developer of the Original Code is
 * TurboPower Software
 *
 * Portions created by the Initial Developer are Copyright (C) 1991-2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * ***** END LICENSE BLOCK ***** *)

{*********************************************************}
{*                   EXTHAN0.PAS 4.06                    *}
{*********************************************************}

{**********************Description************************}
{* Uses RegisterTriggerHandler with TApdComPort.         *}
{*********************************************************}

unit Exthan0;

interface

uses
  WinTypes, WinProcs, SysUtils, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, ooMisc, AdPort, ADTrmEmu;

type
  TMyListBox = class(TListBox)
    procedure TriggerAvail(var Message : TMessage); message APW_TRIGGERAVAIL;
  end;

  TForm1 = class(TForm)
    ApdComPort1: TApdComPort;
    Register: TButton;
    Memo1: TMemo;
    procedure RegisterClick(Sender: TObject);
    procedure ListBoxKeyPress(Sender: TObject; var Key: Char);
  private
    ListBox1 : TMyListBox;
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  GlobalPort : TApdComPort;

implementation

{$R *.DFM}

procedure TMyListBox.TriggerAvail(var Message : TMessage);
var
  I : Word;
  S : String;
begin
  S := '';
  for I := 1 to Message.wParam do
    S := S + GlobalPort.GetChar;
  Items.Add(S);
end;

procedure TForm1.RegisterClick(Sender: TObject);
begin
  GlobalPort := ApdComPort1;
  ListBox1 := TMyListBox.Create(Self);
  ListBox1.Name := 'ListBox1';
  ListBox1.Parent := Self;
  ListBox1.Top := Memo1.Top + Memo1.Height + 8;
  ListBox1.Left := 8;
  ListBox1.Show;
  ListBox1.OnKeyPress := ListBoxKeyPress;
  ApdComPort1.Dispatcher.RegisterWndTriggerHandler(ListBox1.Handle);
end;

procedure TForm1.ListBoxKeyPress(Sender: TObject; var Key: Char);
begin
  GlobalPort.Output := Key;
end;

end.