vibranceDLL is the C/C++ project that powers vibranceGUI by granting interopability to NVIDIAs NVAPI. You can think of the DLL as an proxy between C# and the native NVAPI calls.
More information and vibranceGUI binary download available at: http://vibrance.pushre.de/
When compiling, make sure to compile for x86 target platform and use unicode charset. Change the runtime library setting to Multithreaded (/MT) under Visual Studios project properties (Tab "C/C++" => "Code Generation").
Every contribution is greatly appreciated. Do not hesitate to submit every issue and pull request that comes to your mind.