Error in Opengl opencl interoperation-Collection of common programming errors

I get the following 4 errors after compiling.

error C2065: 'CL_GL_CONTEXT_KHR' : undeclared identifier    
error C2065: 'CL_WGL_HDC_KHR' : undeclared identifier   
IntelliSense: identifier "CL_GL_CONTEXT_KHR" is undefined   
IntelliSense: identifier "CL_WGL_HDC_KHR" is undefined

I use following headers:

#include  
//#include  
#include  
#include  
#ifdef MAC 
    #include  
    #include  
    #include  
    #define GL_SHARING_EXTENSION "cl_APPLE_gl_sharing" 
#else 
    #include  
    #include  
    #include