private void updateSample() { renameFormat = TrackWriter.GetRenameFormat(cboRename.Text); dirFormat = TrackWriter.GetDirFormat(cboSubdirectory.Text); if (pathIsValid(complexify(root()))) { btnOK.Enabled = true; sampleText = Path.Combine((root()), TrackWriter.GetPath(sampleTrack, dirFormat, renameFormat));// +sampleTrack.DefaultExtension; } else { sampleText = invalidPath; btnOK.Enabled = false; } this.Invalidate(); }