Code cave in C++?

[kb432]

How do i add an executable code / exe to another executable's body. So when the first file runs it will also execute the second files body from the first one? 

i have heard like code cave but with all modification. how do i do it ? 

In C or C++ programming language?

[Loki]

You really need to start searching for yourself..... all these topics have well documented answers.

Your process should be this: Read, try, re-read, retry, ask a well formed question.

Otherwise, you will never get anywhere

[atom0s]

There is a giant article covering this on CodeProject. Google it and you will find it easily..