Where Online Learning is simpler!

The C and C++ Include Header Files

cat -n /usr/include/X11/extensions/recordstr.h

     1	#warning "recordstr.h is obsolete and may be removed in the future."
     2	#warning "include <X11/extensions/record.h> for the library interfaces."
     3	#warning "include <X11/extensions/recordproto.h> for the protocol defines."
     4	#include <X11/extensions/recordproto.h>