Components for Delphi and C++ Builder.

type
  TDBGridInplaceEditCrack = class(TDBAxisGridInplaceEdit);
  TDBGridEhCrack = class(TDBGridEh);

procedure TForm1.SpeedButton1Click(Sender: TObject);
var
  Handled: Boolean;
  ColIdx: Integer;
begin
  ColIdx := 0;
  DBGridEh1.SetFocus;
  DBGridEh1.SelectedIndex := ColIdx;
  DBGridEh1.EditorMode := True;
  Handled := False;
  TDBGridInplaceEditCrack(DBGridEh1.InplaceEditor).ButtonDown(True, Handled);
  if not Handled then
    TDBGridEhCrack(DBGridEh1).EditButtonDefaultAction(DBGridEh1.InplaceEditor,
      nil, DBGridEh1.Columns[ColIdx].EditButton, nil, EmptyRect, DBGridEh1.Columns[ColIdx], True, Handled);
end;