Перевод в верхний регистр первого вводимого символа

procedure TForm1.DBEdit1KeyPress(Sender: TObject; var Key: Char);
begin
  if (DBEdit1.SelStart = 0) then
    Key := upCase(Key);
end;

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;