[Beqa Gurgenidze]

Originally Posted by killerZM ty @edit what if need to get message arguments ?

then you need to hook WriteByte, WriteCoord etc.. + MessageEnd forwards.

then you need to create bool array where you will which message arguments are you getting from forward WriteXXXX.

bool MessageHooked[256];

Lets hook health message & get argument (1 Byte Argument) (https://wiki.alliedmods.net/Half-life_1_game_events)

#define MESSAGE_HEALTH 70

void OnMessageBegin(int Dest, int Type, const float *pOrigin, edict_t *pPlayer)
{
	switch (Type)
	{
	case MESSAGE_HEALTH:
	{
		MessageHooked[MESSAGE_HEALTH] = true;
		RETURN_META(MRES_IGNORED);
	}
	}

	RETURN_META(MRES_IGNORED);
}

void OnWriteByte(int Value)
{
	if (MessageHooked[MESSAGE_HEALTH])
	{
		// First Value = health
		// Wanna Change IT?
		// then do like this
		WRITE_BYTE(Value * 2);
		RETURN_META(MRES_SUPERCEDE);
	}

	RETURN_META(MRES_IGNORED);
}

void OnMessageEnd(void)
{
	MessageHooked[MESSAGE_HEALTH] = false;
	RETURN_META(MRES_IGNORED);
}

didnt checked this code, but must work.
ofc you must hook those forwards with g_pengfuncsTable;