[Source Code]Setting up a vindictus base[Hell_Demon]

#include <windows.h> //windows header
#include "sdk.h" //contains the sdk headers that we'll be using.

/**************************
**	Forward Declarations **
**	and global variables **
**************************/
void HackThread(void);
bool IsGameReady(void);

IBaseClientDLL		*pBaseClient = NULL;		//a pointer to the IBaseClientDLL interface, initialized as NULL
IVEngineClient		*pEngineClient = NULL;		//a pointer to the IVEngineClient interface, initialized as NULL
IClientEntityList	*pClientEntityList = NULL;	//a pointer to the IClientEntityList interface, initialized as NULL
ICvar				*pCvar = NULL;				//a pointer to the ICvar interface, initialized as NULL

/*
	Function: BOOL APIENTRY DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved)
	Purpose: Handles events for the current DLL(process/thread attach/detach events)
	Arguments:
		HMODULE hModule		- A handle to this module
		DWORD	dwReason	- The event that occured(DLL_PROCESS_ATTACH, DLL_THREAD_ATTACH, DLL_THREAD_DETACH, DLL_PROCESS_DETACH)
		LPVOID	lpReserved	- Reserved
	Returns:
		TRUE on success
		FALSE on failure
*/
BOOL APIENTRY DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved)
{
	switch(dwReason) //'switch' to dwReason, could use if's instead
	{
	case DLL_PROCESS_ATTACH: //we 'attached' to the process
		DisableThreadLibraryCalls(hModule); //Disable calls to dllmain for DLL_THREAD_ATTACH and DLL_THREAD_DETACH
		CreateThread(0, 0, (LPTHREAD_START_ROUTINE)HackThread, 0, 0, 0); //Create a thread that runs our HackThread function
		break; //break out of the switch statement
	}
	return TRUE; //success
}

/*
	Function: void HackThread(void)
	Purpose: The main function for our hack, here is where we have our code
	Arguments:
		-
	Returns:
		-
*/
void HackThread(void)
{
	HMODULE hEngineModule, hClientModule; //module handles
	CreateInterfaceFn pEngineFactory, pClientFactory; //CreateInterface function pointers

	while(!IsGameReady())	//while the game isn't ready
		Sleep(1000);		//wait for a second before checking again

	//Here the game is ready, so we get handles to the dlls
	hEngineModule = GetModuleHandle("engine.dll"); //Get a handle to the engine dll
	hClientModule = GetModuleHandle("client.dll"); //Get a handle to the client dll

	//Get the function pointers to the CreateInterface functions
	pEngineFactory = (CreateInterfaceFn)GetProcAddress(hEngineModule, "CreateInterface"); //Get the address of the CreateInterface function in engine.dll
	pClientFactory = (CreateInterfaceFn)GetProcAddress(hClientModule, "CreateInterface"); //Get the address of the CreateInterface function in client.dll

	//Nullpointer checks
	if(pEngineFactory == NULL || pClientFactory == NULL) //if any of the two function pointers is NULL
	{
		MessageBox(0, "A CreateInterface pointer was NULL, shutting down!", "Failure", MB_OK); //Warn us about it
		exit(0); //and exit the game
	}

	//Get pointers to the existing interfaces in client.dll
	pBaseClient			= (IBaseClientDLL*)pClientFactory(CLIENT_DLL_INTERFACE_VERSION, 0);				//CLIENT_DLL_INTERFACE_VERSION is defined as "VClient013"
	pClientEntityList	= (IClientEntityList*)pClientFactory(VCLIENTENTITYLIST_INTERFACE_VERSION, 0);	//VCLIENTENTITYLIST_INTERFACE_VERSION is defined as "VClientEntityList003"

	//Get pointers to the existing interfaces in engine.dll
	pEngineClient	= (IVEngineClient*)pEngineFactory(VENGINE_CLIENT_INTERFACE_VERSION, 0);	//VENGINE_CLIENT_INTERFACE_VERSION is defined as "VEngineClient012"
	pCvar			= (ICvar*)pEngineFactory(VENGINE_CVAR_INTERFACE_VERSION, 0);			//VENGINE_CVAR_INTERFACE_VERSION is defined as "VEngineCvar003"

	if(pBaseClient == NULL || pClientEntityList == NULL || pEngineClient == NULL || pCvar == NULL) //if any of the pointers is NULL
	{
		MessageBox(0, "One of the interface pointers is NULL, shutting down!", "Failure", MB_OK); //Warn us about it
		exit(0); //and exit the game
	}

	while(1) //We passed all the checks, so we can enter an infinite loop
	{
		if(GetAsyncKeyState(VK_NUMPAD1)&1) //if the first bit for numpad1 is set(initial press & repeats)
		{
			pEngineClient->ClientCmd("monster_attack_bonus_ratio -80"); //enable godmode using ClientCmd
		}
		if(GetAsyncKeyState(VK_NUMPAD3)&1) //if the first bit for numpad3 is set(initial press & repeats)
		{
			//Disable godmode using ConVars
			ConVar *pGodmode = pCvar->FindVar("monster_attack_bonus_ratio"); //get a pointer to the ConVar
			if(pGodmode != NULL) //make sure it isn't a NULL pointer!
				pGodmode->SetValue(pGodmode->GetDefault()); //Set the convar back to the default value
		}
		Sleep(100); //Sleep(pause) the thread for 100 miliseconds
	}
}

/*
	Function: bool IsGameReady(void)
	Purpose: Checks if the game has loaded the required dll's
	Arguments:
		-
	Returns:
		true if the required dlls are loaded
		false if they aren't
*/
bool IsGameReady(void)
{
	if(	GetModuleHandle("client.dll") &&	//Can we get a handle to client.dll
		GetModuleHandle("engine.dll")		//and engine.dll?
		)
	{
		return true; //we can get handles, so the game is ready
	}
	return false; //we missed 1 or more handles, so the game isn't ready yet!
}

#pragma once //prevent the compiler from regenerating symbols for this file(important when included in multiple .cpp files)

#include "cdll_int.h"			//IVEngineClient and IBaseClientDLL interfaces
#include "icliententitylist.h"	//IClientEntityList interface
#include "icvar.h"				//ICvar interface

#include "icliententity.h"		//IClientEntity class
#include "convar.h"				//ConVar and ConCommand classes

//The source engine makes some funny defines, so we have to undefine them or we won't be able to use windows' functions with those names
#undef CreateThread	
#undef GetAsyncKeyState