Please Someone Help me

I'm making a software like Quick Books and i need help

There is a text Box in which Item No. will be placed. Those item Numbers aren't editable. They should come in Automatically when i press the Add command button

For example there is a record:
Book: Angels and Demons
Item No. : 4

After this when i press the Add button the item No. should autmatically come 5 and i should only need to enter the Book's name.

Thanks. :sad:

Have a variable that holds the item number. Every time the ADD ITEM button is pressed, increment the item number and load the number into the text box. Make the text box 'Enable=FALSE' and it can't be edited.