C++ code for CPU load and CPU temperature

Recently I have started a similar project. I needed to read the cpu temperature and to control the fan in Linux and Windows. I don't know much about C++ and VS and DDK but I figured how to write a simple kernel driver and a simple program with winring0. In my laptop (and most other) the temperature and the fan is controled by the embedded controller. You have 2 choices, either you can write a kernel driver or you can use a library to access the embedded controller. It's because Windows protect the ec from being accessed with normal user rights. A good (and working) library is winring0 (WinRing0_1_3_1b). A useful program to check the ec and everything else in Windows is the RW tool.

Take a look at Getting CPU temp from MSDN forums, there are a few approaches.

As to the sane way, you can use Win32_TemperatureProbe class, that gets its intel from SMBIOS.