Datagridview keypress

Question

hi everyone,

 
i am creating a project where i populate a datagridview, this datagridview has various rows and columns like c1,c2,c3,c4,c5. However i would like that when i keypress my datagridview along any of the populated rows, i want to be able to carry only the value of c1(column1) to textbox1 irrespective of which column of the row is highlighted when i keypress on the datagridview

any help will be of great help.
thanks again and Best Regards