How To Creat an Injector

So one more time need some help.

This time i am ready to creat my first "program" using VB.

I need some informations about:

1) the codes
2) how to desing it (or its a personal desicion?)
3) how the injector auto or manual close
4) how to make a textbox to write what game i will open with

and more :P

If anyone has the time and goodwill to help, reply to this post