Customer Control in vb6

i have very simple application of maintaining student information. application hv two table and two form .

1st table for student information having 4 field:-StuID, StuNam, StuAdd, StuScholashi

2nd table Student Payment Info having 4 field :-PayID,PayAmt,PayDat,ANd student making payment

both r related with student id (from 1st table) and student making payment(foreign key)

now i hv two form

1st form with text field shows student information

2nd form with text field shows payment history ...

and i have command button in both form like Add, Delete, Search,Modify and nevigation

now i have been told to do remove all common part from both form and put in 1 generic form so what ever will be remaining in both form is only related to dat perticular form only which will make then as custome control...so will be having 2 custome control

now whn at run time when user will place student-custome control in generic form and suppose click on add button adding of student should tac place..similarly for Payment-custome...addition of payment should tac place...

define interface, interface as in "Definition of the abstract methods" .e. a collection of function signatures

Now in each custom control implement these method (similar to polymorphism), so when I call DataDelete() in the generic form

it will call the appropriate delete method in the user control which is loaded at the time

Summary: we require

>1 common container form

>2 user controls

>1 interface

>user controls to implemnt the methods of the interface

>container control buttons will call the methods of the interface

>container control will have to maintain a reference to the control which is loaded at that time in it

so that it cn call the correct method

>container control will load the user control at run-time

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