find out the word in Excel

Question

I have a WPF contains a  text box and I also have an excel file contains of thousands of Employee names.if i entered a specific name in my search text box in WPF then it run and open that excel file and highlight the name entered in excel file.

 

(ex) I have a excel file contain some employee Names  ,if i entered " raj" in my text box and I run the program ,then i want to  open the excel file and highlight the respected cell.Can anyone suggest me how can i do that?