The amxmodx header is included in the amxmod header
Code:
/* AMX Mod X Backwards Compatibility
*
* by the AMX Mod X Development Team
*
* This file is provided as is (no warranties).
*/
#if defined _amxmod_included
#endinput
#endif
#define _amxmod_included
#include <amxmodx>
#include <cstrike>
#include <engine>
#include <fun>