Program For Class That Acts Like An Accounting Ledger Or Checkbook Organizer

I am writing a program for class that acts like an accounting ledger or checkbook organizer. There are many things that I can't figure out how to make happen.

First- I need a running total of credits and debits at the bottom of the form. I can't figure out how to get that to display. I tried it, but it just locks up the program.

Second- I put in an error handler for non-numeric input and that works but when I want to clear all fields with the clear button it errors each field for not having an entry. I tried 6 ways to Sunday to accept (""), but it messes up other things.

Third- I want 5 transactions to be visible with the ability to have 7. I have hidden the last two and want them to display when the new transaction button is clicked, but can't find anything in my book that would allow that to happen.

Public Class

'Declarations
Dim Tran1, Tran2, Tran3, Tran4, Tran5, Tran6, Tran7, TotalCred, TotalDeb As Double
Dim NewBal1, NewBal2, NewBal3, NewBal4, NewBal5, NewBal6, NewBal7, BegngBal As Integer

[CODE]................................