Chapter 1, Snippet 2 - OpenGLBook.com

chapter.1.2.c

void Initialize(int argc, char* argv[])
{
  GLenum GlewInitResult;

  InitWindow(argc, argv);

  GlewInitResult = glewInit();

  if (GLEW_OK != GlewInitResult) {
    fprintf(
      stderr,
      "ERROR: %s\n",
      glewGetErrorString(GlewInitResult)
    );
    exit(EXIT_FAILURE);
  }

  fprintf(
    stdout,
    "INFO: OpenGL Version: %s\n",
    glGetString(GL_VERSION)
  );

  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}