In Excel, the cursor changes to look like <-I-> when it is in the correct position to start resizing (column or row), and stays the same when the user is doing the resize - good visual feedback.

In RadSpreadsheet, we get a similar <-I-> cursor when in position to re-size, but this goes away (back to the normal pointer) whilst the user is re-sizing. The re-size operation works just fine, but I don't get the feedback whilst doing it.

Please refer to the two gif files illustrating the behavior in MS Excel and in RadSpreadsheet.

Filter buttons are not hidden when a column is hidden

Workaround in the attached project. 

Steps to reproduce: 

1. Handle the MessageShowing event like this: 

private void SpreadsheetElement_MessageShowing(object sender, Telerik.WinForms.Controls.Spreadsheet.MessageShowingEventArgs e)
{
    e.IsHandled = true;
}

2. Protect the Workbook 

3. Start the app and paste with the context menu

Actual: A dialog is shown