   Undeclared functions
  Several OpenGL functions, which most of my resources treat as givens, seem to be undeclared for me. So far, glGet and gl(Client)ActiveTexture don't work, but I have checked the supported extensions, and not only is GL_ARB_multitexture among them, but my OpenGL version is 1.4, so I have no idea why I'm getting these errors.#include <gl\gl.h>#include <GL\glut.h>#include <GL\glaux.h>#include <stdlib.h>#include <vector>#include <iostream>#include <tga.h>#include <math.h>#include <time.h>#include <sstream>using namespace std;#pragma comment( lib, "opengl32.lib" )#pragma comment( lib, "glu32.lib" )#pragma comment( lib, "glaux.lib" )These are my includes.   
  See the forum FAQ or the OpenGL wiki on how to go beyond OpenGL 1.1.   