Searching records inside a datagridview for the characters pressed

Hi,
     How can we search for the text inside a datagridview itself without using a textbox.What i mean is i want to make a record selection in a datagridview in the same way as a search using a Textbox_textchanged event.Ie, if i press "H" in a column of a datagridview it should  point to the record starting with "H" and when i again press "E" it should point to the record starting with "HE" and when i press "L" it should point to the Records starting with "HEL" and so on.ie is the same way we use "LIKE" in textbox_textchanged event

Thanks in advance