What is the difference between cipher block chaining mode and electronic code book mode?

ECB (Electronic Codebook) is essentially the first generation of the AES. It is the most basic form of block cipher encryption.

CBC (Cipher Blocker Chaining) is an advanced form of block cipher encryption. With CBC mode encryption, each ciphertext block is dependent on all plaintext blocks processed up to that point.

i think its controle not shift

a macro is a tool that allows you to automate tasks and add functionality to your forms, reports, and controls. for example, if you add a command button to a form, you associate the button's onclick event to a macro, and the macro contains the commands that you want the button to perform each time it is clicked.