Project Structure

• KPreview.dpr
• KPrevF.pas
• KPrevF.dfm

program KPreview;

uses
  Forms,
  KPrevF in 'KPrevF.pas' {Form1};

{$R *.RES}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.

unit KPrevF;

interface

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

type
  TForm1 = class(TForm)
    RadioPreview: TRadioGroup;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    procedure RadioPreviewClick(Sender: TObject);
    procedure FormKeyPress(Sender: TObject; var Key: Char);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.RadioPreviewClick(Sender: TObject);
begin
  KeyPreview := RadioPreview.ItemIndex <> 0;
end;

procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);
begin
  case RadioPreview.ItemIndex of
    1: //  Enter = Tab
      if Key = #13 then
      begin
        Key := #0;
        Perform (CM_DialogKey, VK_TAB, 0);
      end;
    2: //  Type in Caption
    begin
      if Key = #8 then // backspace: remove last char
        Caption := Copy (Caption, 1,
          Length (Caption) - 1)
      else if Key = #13 then // enter: stop operation
        RadioPreview.ItemIndex := 0
      else // anything else: add character
        Caption := Caption + Key;
      Key := #0;
    end;
    3: // Skip vowels
      if Key in ['a', 'e', 'i', 'o', 'u',
          'A', 'E', 'I', 'O', 'U'] then
        Key := #0;
  end;
end;

end.

object Form1: TForm1
  Left = 168
  Top = 113
  Width = 545
  Height = 250
  Caption = 'Key Preview'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = True
  OnKeyPress = FormKeyPress
  PixelsPerInch = 96
  TextHeight = 13
  object RadioPreview: TRadioGroup
    Left = 16
    Top = 16
    Width = 209
    Height = 177
    Caption = 'Preview Options'
    ItemIndex = 0
    Items.Strings = (
      'None'
      'Enter = Tab'
      'Type in Caption'
      'Skip vowels')
    TabOrder = 0
    OnClick = RadioPreviewClick
  end
  object Edit1: TEdit
    Left = 264
    Top = 48
    Width = 121
    Height = 21
    TabOrder = 1
    Text = 'Edit1'
  end
  object Edit2: TEdit
    Left = 264
    Top = 80
    Width = 121
    Height = 21
    TabOrder = 2
    Text = 'Edit2'
  end
  object Edit3: TEdit
    Left = 264
    Top = 112
    Width = 121
    Height = 21
    TabOrder = 3
    Text = 'Edit3'
  end
end