如何运行输入框的循环，将数据放在VBA中的不同行上

I have a spreadsheet that you press a Form Control Button, and that will prompt a Input Box that asks you to enter a name of non-stores item. Then if you enter in something in the input box it will put it in cell A19, then it will ask you for the lead time of the item and put that in C19. If you don't enter anything in the Non-stores Material input it will not bring up the lead time in put box.I have a spreadsheet that you press a Form Cont