-typedef void (*PFNGLVERTEXATTRIBPOINTERPROC)
- (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride,
- const GLvoid *pointer);
+typedef void (APIENTRY *PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);