internal static void SelectAll(Form1 form) { WebBrowser helpWebBrowser = (WebBrowser)form.splitContainer1.Panel2.Controls["helpWebBrowser"]; //form.helpWebBrowser; CustomToolStripTextBox urlToolStripTextBox = form.urlToolStripTextBox; TextBox searchTextBox = form.searchTextBox; if (urlToolStripTextBox.Focused) { urlToolStripTextBox.SelectAll(); } else if (searchTextBox.Focused) { searchTextBox.SelectAll(); } else if (helpWebBrowser.Document != null) { helpWebBrowser.Document.ExecCommand("SelectAll", false, null); } }