i need help. i am developing Univ management system.I create course form where course name and all relevant data is entered. Now i want when i select some course in student form then all the data of that course comes in the student form. mean financials and credit hours and subjects?And secondly when the course is selected for some student. then future changes in that course will not effect  this. Mean fees will be reviewed in future will not change the financials of previous students.