TEdit, TSpinEdit

Code:

var

words: TStringList;

procedure TForm1.FormCreate(Sender: TObject);

begin

words := TStringList.Create;

words.Sorted := true;

words.Add('one');

words.Add('two');

words.Add('four');

words.Add('five');

words.Add('six');

words.Add('seven');

words.Add('eight');

words.Add('nine');

words.Add('ten');

end;

procedure TForm1.Edit1KeyUp(Sender: TObject; var Key: Word;

Shift: TShiftState);

const

chars: set of char = ['A'..'Z', 'a'..'z', 'А'..'Я', 'а'..'я'];

var

w: string;

i: integer;

s: string;

full: string;

SelSt: integer;

begin

case Key of

   VK_RETURN, VK_TAB:

   begin

     Edit1.SelStart := Edit1.SelStart + Edit1.SelLength;

     Edit1.SelLength := 0;

     Exit;

   end;

   VK_DELETE, VK_BACK:

   begin

     Edit1.ClearSelection;

     Exit;

   end;

end;

s := Edit1.Text;

SelSt := Edit1.SelStart;

i := SelSt;

if (length(s) > i) and (s[i+1] in chars) then

   Exit;

w := '';

while (i >= 1) and (s[i] in chars) do

begin

   w := s[i] + w;

   dec(i);

end;

if length(w) <= 0 then

   Exit;

words.Find(w, i);

if (i >= 0) and (UpperCase(copy(words[i], 1,

length(w))) = UpperCase(w)) then

begin

   full := words[i];

   insert(copy(full, length(w) + 1, length(full)), s, SelSt + 1);

   Edit1.Text := s;

   Edit1.SelStart := SelSt;

   Edit1.SelLength := length(full) - length(w);

end;

end;