OpenTween.TweenMain.MenuItemSearchPrev_Click C# (CSharp) Method

        private void MenuItemSearchPrev_Click(object sender, EventArgs e)
        {
            var previousSearch = this.SearchDialog.ResultOptions;
            if (previousSearch == null || previousSearch.Type != SearchWordDialog.SearchType.Timeline)
            {
                this.SearchDialog.Reset();
                this.ShowSearchDialog();
                return;
            }

            // 前を検索
            this.DoTabSearch(
                previousSearch.Query,
                previousSearch.CaseSensitive,
                previousSearch.UseRegex,
                SEARCHTYPE.PrevSearch);
        }