private void findAndReplaceRegExToolStripMenuItem_Click(object sender, EventArgs e) { TabPage tb = tabControl1.SelectedTab; if (tb as EditorTabPage == null) { return; } EditorTabPage etb = tb as EditorTabPage; findReplaceDialog.SetFocusOnSearchTextField(); findReplaceDialog.Text += " RegEx"; if (findReplaceDialog.ShowDialog() == DialogResult.OK) { etb.FindAndReplaceRegEx(findReplaceDialog.Search, findReplaceDialog.Replacement, findReplaceDialog.Options); } }