WatiN pressTab does not press tab

Do you want you to press the tab key yourself, or just click on the HTML element that looks like a tab? For the latter, use the Click method on the corresponding element (Div, Span, etc.). Otherwise, you can try SendKeys instead of PressTab. eg:.

IE ie = new IE("http://www.google.com");
ie.AutoClose = false;
ie.TextField(Find.ByName("q")).Click();
SendKeys.SendWait("{TAB}");

      

        
        
        
      

    

The above example will highlight the focus of the text box and then open the tab by clicking the search button.