AutoScrolling With Row Change Or Write Textbox

iam having a form,DatagridView,textbox datagridview contains a data when we write in textbox so the datagriview row select who matching data with textbox for example i write in textbox Nims so the datagridview row select where the nims find in any rows so the problem is that when we it select row but its not scrolling suppose i write in textbox Nims and Nims find in datagridview 100 index so datagridview row select but problem is that its not auto scrol i want to when i write in textbox so who match in datagridview who select in first row