//eth.c

void HookLoad() {

if (!syscall_CG_Key_IsDown(ETH_HOOKLOAD_KEY)) {
 eth.hookLoad = qtrue;
 return;
 }

 eth.hookLoad = qfalse;
}


//eth.h
#define ETH_HOOKLOAD_KEY K_F6 //x11 key
void HookLoad();

//engine.c 

HookLoad();