how to make auto refresh label?

Question

hi friends ... i want to make an auto refresh label to display a row count and auto refresh her self every some seconds? for example i have a table caled student_info it have column caled student_id i ... every student have a student_id ... i want to count number of student_ids in the table (number of students) and display it by a label in the form and every i insert new student the refresh her self and increment the number of students?