In order to enable spell checker, the toolbar will have to have a spell checker button, as demonstrated in the IntegrationWithWebSpellChecker.aspx sample. In the ToolBar_SaveAndLoadStructure.aspx, please use the Rich toolbar setting in order to solve the issue.

<ToolBarSettings ToolBarMode="Rich" />

If you already set the FreezePaneSetting during design time, you could use this snippet to Freeze or Unfreeze the pane on the client side:

function FreezeGrid() {
    var grid = ISGetObject('WebGrid1');
    grid.LayoutSettings.FreezePaneSettings.ActiveFrozenColumns = 2;
    grid.FreezePane(true);
}

function UnfreezeGrid() {
    var grid = ISGetObject('WebGrid1');
    grid.UnfreezePane();
}

The function will be similar with the Freeze Pane and Unfreeze Pane in the WebGrid context menu.

The snippet you found is still using previous WebGrid reference. If you are using WebGrid 6 or 7, please use this snippet to achieve the same functionality:

function checkAll() {
    // get an instance of the WebGrid
    var grid = ISGetObject('grdObj');

    //Header processing
    var RowHeader = grid.RootTable.GetElement(WG40.COLHEADER, WG40.HTMLTABLE).getElementsByTagName("tr")[0]
    RowHeader.getElementsByTagName("td")[1].getElementsByTagName('input')[0].checked = true;
    
    // collect all checkboxes
    // get all rows element of the WebGrid
    var rows = grid.RootTable.GetElement(WG40.BODY, WG40.HTMLTABLE).getElementsByTagName("tr");

    // iterate through all rows
    for (var i = 0; i < rows.length; i++) {
        if (rows[i].type == "Record") {
            // get the first column of the current row (checkbox)
            var cell = grid.GetRowByElement(rows[i]).GetCell(0).CellElement;
            cell.childNodes[0].checked = true;
        }
    }
}

I also attached a sample that I used to test the snippet.

Thank you for the correction, I will update the bug report note with the new information.

In order to add the runtime license key easily, please use the Deployment Manager, default location in C:\Program Files\Intersoft Solutions\WebUI Studio for ASP.NET\WebUI.NET Framework 3.0\DeploymentManager\ISNet.WebUI.DeploymentManager.exe. If you would like to add it manually in the web.config, you will need to add the key under appSettings tag.

<appSettings>    <add key="ISNet.WebUI.WebGrid.v7_0_7200.RunTimeLicenseKey" value="xxxxx-xxxx-xxxxx" />
</appSettings>

The runtime license key could be viewed in TDN, http://dev2.intersoftpt.com,  under the My Components window.