my $cwLogLevelData = $configWin->AddTextfield(
  -name => "cwLogLevelData",
  -pos => [100, 100],
  -width  => 80,
  -height => 20,
  -background => [255,255,255],
  -tabstop => 1,
);

  $cwLogLevelData->Append("One");

  $cwLogLevelData->Clear();
  $cwLogLevelData->Append("Two");