#include <GL/GL.h>
typedef HGLRC(WINAPI* PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int* attribList);
#define WGL_CONTEXT_MAJOR_VERSION_ARB             0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB             0x2092
#define WGL_CONTEXT_PROFILE_MASK_ARB              0x9126
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB          0x00000001
#define WGL_CONTEXT_FLAGS_ARB                     0x2094
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB = NULL;
HGLRC CreateGL(HDC hDC, int major, int minor)
{
    HGLRC hRC_temp = wglCreateContext(hDC);
    if (!hRC_temp) return NULL;

    if (!wglMakeCurrent(hDC, hRC_temp))
    {
        wglDeleteContext(hRC_temp);
        return NULL;
    }
    wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");

    if (!wglCreateContextAttribsARB)
    {
        wglMakeCurrent(NULL, NULL);
        return hRC_temp; 
    }
    const int attribs[] = {
        WGL_CONTEXT_MAJOR_VERSION_ARB, major,
        WGL_CONTEXT_MINOR_VERSION_ARB, minor,
        WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
        0 
    };

    HGLRC hRC_final = wglCreateContextAttribsARB(hDC, 0, attribs);
    wglMakeCurrent(NULL, NULL);
    wglDeleteContext(hRC_temp);

    return hRC_final;
}