unit1.pas

主功能使用键盘的方向键来实现主面板上控件的转换

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Edit5: TEdit;
    Edit6: TEdit;
    procedure Edit1KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Edit1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  case Key of
  //如果是向左方向键
   VK_LEFT: begin
     if (Sender as TEdit).Selstart<>0 then Exit;
     Perform(WM_NEXTDLGCTL,1,0);
     if (ActiveControl is TEdit) then
      (ActiveControl as Tedit).selstart :=
               (ActiveControl as Tedit).MaxLength - 1;
    end;
   VK_RIGHT: begin
   //如果是向右方向键
     if (Sender as TEdit).Selstart<>(Sender as TEdit).GetTextLen
              then Exit;
     Perform(WM_NEXTDLGCTL,0,0);
     if (ActiveControl is TEdit) then
      (ActiveControl as Tedit).selstart :=0;
    end;
  end;       
end;
end.