Programming a billing application

[AIS4U]

I am not being critical of your code, but you have used some rather bad coding practices. That's ok, as you learn more, you will improve.

I put a textbox on the form to put the Deposit amount in. I have it set so that you can add any amount you want to it, but you could just a easily set the txtDep to $30.00 and leave it at that, if it is to be the same for all items.

I moved the code to populate your first listobx to the form load event, but you of course can have it where ever you wish.

I also added a blank line with a line going across to kind of make it look a little better.
I did the same for the billing list box.

I have just modified your code (which like I said, could use some refinement), but I got it to work using most of your code.

Good Luck