学習Message(14):左右Shift、Ctrl、Altを区別

コードファイル:

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Memo1: TMemo;

    procedure FormCreate(Sender: TObject);

    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;

      Shift: TShiftState; X, Y: Integer);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.FormCreate(Sender: TObject);

begin

  Memo1.Align := alLeft;

  Memo1.ScrollBars := ssVertical;

  Memo1.Clear;

end;



procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;

  Shift: TShiftState; X, Y: Integer);

begin

  if GetKeyState(VK_SHIFT)  < 0 then Memo1.Lines.Add('Shift');

  if GetKeyState(VK_LSHIFT) < 0 then Memo1.Lines.Add('LeftShift');

  if GetKeyState(VK_RSHIFT) < 0 then Memo1.Lines.Add('RightShift');



  if GetKeyState(VK_CONTROL)  < 0 then Memo1.Lines.Add('Ctrl');

  if GetKeyState(VK_LCONTROL) < 0 then Memo1.Lines.Add('LeftCtrl');

  if GetKeyState(VK_RCONTROL) < 0 then Memo1.Lines.Add('RightCtrl');



  if GetKeyState(VK_MENU)  < 0 then Memo1.Lines.Add('Alt');

  if GetKeyState(VK_LMENU) < 0 then Memo1.Lines.Add('LeftAlt');

  if GetKeyState(VK_RMENU) < 0 then Memo1.Lines.Add('RightAlt');



  Memo1.Lines.Add('');

end;



end.


 
   

フォームファイル:

object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 206

  ClientWidth = 339

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  OnCreate = FormCreate

  OnMouseDown = FormMouseDown

  PixelsPerInch = 96

  TextHeight = 13

  object Memo1: TMemo

    Left = 80

    Top = 80

    Width = 185

    Height = 89

    Lines.Strings = (

      'Memo1')

    TabOrder = 0

  end

end