The OpenCV library is great. Most functions have the required functionality, however, I would like to modify some of the functions and recompile so that it fits my specific needs. how would we recompile the dlls and other files? is there a built-in script or do we need to write all the scripts ourselves?
According to the install guide, you'll need CMake to compile it on Windows.
I found this tutorial that shows step-by-step how to compile OpenCV 2.0 on Windows, but I believe the instructions also apply for compiling OpenCV 2.1.
This thread is directly related to what you aim.