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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 學習 Message(10): WM_CancelMode 消息測試

學習 Message(10): WM_CancelMode 消息測試

編輯:Delphi

啟動模式窗口, 當前窗口會收到一條 WM_CancelMode 消息; 改消息無參數.

  本例效果圖:

學習 Message(10): WM_CancelMode 消息測試

  代碼文件:

unit Unit1;

interface

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

type
 TForm1 = class(TForm)
  Memo1: TMemo;
  Button1: TButton;
  Button2: TButton;
  Button3: TButton;
  Button4: TButton;
  procedure FormCreate(Sender: TObject);
  procedure Button1Click(Sender: TObject);
  procedure Button2Click(Sender: TObject);
  procedure Button3Click(Sender: TObject);
  procedure Button4Click(Sender: TObject);
 protected
  procedure WMCancelMode(var Message: TWMCancelMode); message WM_CANCELMODE;
 end;

var
 Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
 Memo1.Align := alLeft;
 Memo1.ScrollBars := ssVertical;
 Memo1.Clear;
 Position := poScreenCenter;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 ShowMessage('ShowMessage');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
 InputBox('InputBox','Input','');
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
 MessageBox(Handle, 'Test', 'MessageBox', 0);
end;

procedure TForm1.Button4Click(Sender: TObject);
var
 form: TForm;
begin
 form := TForm.Create(Self);
 form.Caption := 'Test';
 form.Width := Width div 2;
 form.Height := Height div 2;
 form.Position := poDesktopCenter;
 form.ShowModal;
end;

procedure TForm1.WMCancelMode(var Message: TWMCancelMode);
begin
 Memo1.Lines.Add('收到 WMCancelMode 消息');
 Message.Result := 0;
end;

end.

  窗體文件:

object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 161
 ClIEntWidth = 301
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 OnCreate = FormCreate
 PixelsPerInch = 96
 TextHeight = 13
 object Memo1: TMemo
  Left = 8
  Top = 8
  Width = 185
  Height = 89
  Lines.Strings = (
   'Memo1')
  TabOrder = 0
 end
 object Button1: TButton
  Left = 207
  Top = 23
  Width = 75
  Height = 25
  Caption = 'Button1'
  TabOrder = 1
  OnClick = Button1Click
 end
 object Button2: TButton
  Left = 207
  Top = 54
  Width = 75
  Height = 25
  Caption = 'Button2'
  TabOrder = 2
  OnClick = Button2Click
 end
 object Button3: TButton
  Left = 207
  Top = 85
  Width = 75
  Height = 25
  Caption = 'Button3'
  TabOrder = 3
  OnClick = Button3Click
 end
 object Button4: TButton
  Left = 207
  Top = 116
  Width = 75
  Height = 25
  Caption = 'Button4'
  TabOrder = 4
  OnClick = Button4Click
 end
end



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