I have completed the basic of C++ with some OOP. I think I am ready enough to go to other level and I want to learn windows API to interact with system kind of 'windows.h' library. So where can I find the resource about it or please recommend me a nice book.
I fear you need to master using google to enter this branch. Dealing with windows API will require significant amount of research. :)
Full reference to WinAPI functions is accessible via MSDN of course. For starting this whole thing I dare to recommend enter "winapi tutorial" in google and choose one which looks more suitable for your taste. There are really tons of them.