Integrating Google C++ testing framework.

Adjust
1. C/C++ > General > Additional Include Directories and
2. Linker > Input > Additional Dependencies
3. C/C++ > Code Generation > Runtime Library to /MT (Release) or /MTd (Debug) according to the Gtest project's settings. Make sure their settings are EQUAL.


Finally, try to run the following sanity test:

#include 

int main(int argc, char** argv) {
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}