Oh, I am talking about doing all this in C++. Visual studio 2003.

Thanks,

Peter.

in-place means that the operation is done directly on input-data.
non-in-place means that the operation is not done directly on input data,
but a temporary buffer is used.
At least that is the definition you'll find in the MSDN glossary.

Writing a library function means that you define a function with input and
output parameters, and then implement that function so that others can call
it.
If you want that function to be redistributable in a separate library you'd
have to build a dll that contains the function.
Other options are to build a static library, a COM class or a .NET managed
class library.

It depends on your requirements. What are you trying to achieve?