Program binaries

If you could provide a bit more context to your question, it would be a lot easier to answer your question.
(where did you read it, etc)

"binaries" is a pretty bad name, but it is what you usually call the files that contain executable code in some form.
It could be exe files, dll files or lib files.
This is probably what you are after, since this is usually what you mean when you write "Program Binaries", but it depends on context.

The word is bad because not only the executable files are "binary". Technically all files are, no matter what they contain.

It is also commonly used to mean any compiled version of any file that you compile from some source description.
This file could be data files or executable files, the main point here is that they are _not_ the original source files.

will any body help me to write code for addition of two number taken from textbox and the sum is display in a textbox

You cant expect people to do your work. And thats a simple task which you could learn to do more useful and complicated things.

Note: writing the same in multiple threads and in multiple forums wont help you learn Symbian. Also sending Private messages with the same text is a little going too far.