how to compile koolplot in vc++?

I have no direct experience of using koolplot, but I would have thought downloading the library, including the main header file (koolplot.h) and then linking to the static library would do the trick.

I usually don't normally use Visual C++ (although have from time to time), but I would assume you can link static libraries to your project by an option in the IDE. Otherwise you could use the '#pragma' preprocessor directive to link the library into your program. Ofcourse the advantage of using a pragma statement is that including the source code without the project file created by Visual C++ should be everything you need to compile. Which would be useful if you intend to transport your code to an OS which doesn't support Visual C++...