Преобразовать первую букву каждого слова к верхнему регистру в TEdit

Вариант 1:

Source: https://www.swissdelphicenter.ch

procedure TForm1.Edit1Change(Sender: TObject);
 var
   OldChange: TNotifyEvent;
   OldStart: Integer;
 begin
   with (Sender as TEdit) do
   begin
     OldChange := OnChange;
     OnChange  := nil;
     OldStart  := SelStart;
     if ((SelStart > 0) and (Text[SelStart - 1] = ' ')) or (SelStart = 1) then
     begin
       SelStart  := SelStart - 1;
       SelLength := 1;
       SelText   := AnsiUpperCase(SelText);
     end;

     OnChange := OldChange;
     SelStart := OldStart;
   end;
 end;

Вариант 2:

Source: DelphiWorld 6.0 https://delphiworld.narod.ru/

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
  with Sender as TEdit do
    if (Text = '') or (Text[SelStart] = ' ')
      or (SelLength = Length(Text)) then
        if Key in ['a'..'z'] then
          Key := UpCase(Key);
end;