How to get an element by XPath in SHDOCVw InternetExplorer model using c#

Hi,

Though i was able to get elements in IE using InternetExplorer object and IHTMLElement , i don't see a method for getting the element by xPath. If it's not directly supported, can anyone let me know if there is way to get it from HTMLDocument or IHTMLElement using c#. I have below examples of xPath

//input[@id='email']

//form[@id='login_form']/table/tbody/tr[2]/td/input


//td/input

Thanks in advance.

Krrishna