how to open excel file in vs2010 in windows form application

Question

hello,,,,,,,,,

        tell me how to open a excel file in windows form

 

In windows form1 - 1 button is there if a button1 pressed it will goto excel how???????

 im tried soo many codeing but its not working plss tell me how to do and code for it

                                      its urgent plss tell me frnds