gistfile1.c

#define GDRAW_GL_EXTENSION_LIST \
   /*  identifier                      import                              procname */ \
   /* GL_ARB_multitexture */ \
   GLE(ActiveTexture,                  "ActiveTextureARB",                 ACTIVETEXTUREARB) \
   /* GL_ARB_texture_compression */ \
   GLE(CompressedTexImage2D,           "CompressedTexImage2DARB",          COMPRESSEDTEXIMAGE2DARB) \
   /* GL_ARB_vertex_buffer_object */ \
   GLE(GenBuffers,                     "GenBuffersARB",                    GENBUFFERSARB) \
   GLE(DeleteBuffers,                  "DeleteBuffersARB",                 DELETEBUFFERSARB) \
   GLE(BindBuffer,                     "BindBufferARB",                    BINDBUFFERARB) \
   GLE(BufferData,                     "BufferDataARB",                    BUFFERDATAARB) \
   /* ... */
   
#define GLE(id, import, procname) static PFNGL##procname##PROC gl##id;
GDRAW_GL_EXTENSION_LIST
#undef GLE

static void load_extensions(void)
{
#define GLE(id, import, procname) gl##id = (PFNGL##procname##PROC) wglGetProcAddress("gl" import);
   GDRAW_GL_EXTENSION_LIST
#undef GLE
}