Memory Not Getting Edited *sad face*

[SpraX]

#include "stdafx.h"
#include <windows.h>
#include <iostream>
using namespace std;


HWND hGame = ::FindWindow((LPCWSTR)"Tom Clancy's The DivisionClass", (LPCWSTR)"Tom Clancy's The Division");

bool unlimitedAmmo = false;

void FunProc()
{	
	int newValue = 255;

	DWORD pID;
	GetWindowThreadProcessId(hGame, &pID);
	HANDLE hProc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pID);


	if (WriteProcessMemory(hProc, (LPVOID) 0x16D578B5E48 , &newValue, (DWORD)sizeof(newValue), NULL )){
		MessageBoxA(0, "Wrote To Memory!!!", 0, 0);
		CloseHandle(hGame);
		FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
	}
	else {
		MessageBoxA(0, "Failed To Write To Memory", 0, 0);
		CloseHandle(hGame);
		FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
	}

}

BOOL __stdcall DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
	if (fdwReason == DLL_PROCESS_ATTACH)
	{
		CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)FunProc, NULL, NULL, NULL);
		MessageBoxA(0, "Dll Injected!!!", 0, 0);
	}
	else if (fdwReason == DLL_PROCESS_DETACH) {
		MessageBoxA(0, "Dll Removed!!!", 0, 0);
	}
	return 1;
}

the adress that i have added there is the base address for my classic ak ammo in The Division , but it cant edit it why??!?! , the dll is indeed injected but box that says failed to write to memory pops up, what am i doing wrong?

[SpraX]

Solved

Dll Now Looks Like This (this changes recoil in The Division)

#include <windows.h>
#include <iostream>
using namespace std;

void FunProc()
{	
	HWND hGame = ::FindWindowW(L"Tom Clancy's The DivisionClass", L"Tom Clancy's The Division");

	int newValue = 0;
	DWORD pID;
	GetWindowThreadProcessId(hGame, &pID);
	HANDLE hProc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pID);

	if (hGame == 0) {
		MessageBoxA(0, "Cant Find The Window", 0, 0);
		FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
	}
	else {
		if (WriteProcessMemory(hProc, (LPVOID)0x7FF69A6C2450, &newValue, (DWORD)sizeof(newValue), NULL)) {
			MessageBoxA(0, "Wrote To Memory!!!", 0, 0);
			FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
		}
		else {
			MessageBoxA(0, "Failed To Write To Memory", 0, 0);
			FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
		}
	}

	FreeLibraryAndExitThread(GetModuleHandle(L"TheDivisionDLL"), 0);
	

}

BOOL __stdcall DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
	if (fdwReason == DLL_PROCESS_ATTACH)
	{
		CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)FunProc, NULL, NULL, NULL);
		MessageBoxA(0, "Dll Injected!!!", 0, 0);
	}
	else if (fdwReason == DLL_PROCESS_DETACH) {
		MessageBoxA(0, "Dll Removed!!!", 0, 0);
	}
	return 1;
}

[Biesi]

No need to use WriteProcessMemory. You can directly edit the memory if your dll is injected into the target process.