Need Help with FindWindow() function

#include <iostream>
#include <windows.h>
#include<TlHelp32.h>
#include<string>


using namespace std;

HANDLE hProcess;

void WriteProcessMemory()
{
	DWORD pid;
	HWND hWindow = FindWindow(0, L"BlackOps3");
	GetWindowThreadProcessId(hWindow, &pid);
	hProcess = OpenProcess(PROCESS_ALL_ACCESS, 0, pid);

	if (hWindow == 0)
	{
		cout << "Cannot find Black Ops, Exiting..." << endl;
		Sleep(5000);
		exit(1);
	}

}



void appTitle()
{
	system("title Black Cocks Trainer");
	WriteProcessMemory();
}

void appFeatures()
{
	system("color a");
	cout << "Created by : FLUFFYBANANAS21" << endl;					
	cout << "----------------------------" << endl << endl << endl;
	cout << "NUMPAD 1 = UNLIMITED AMMO" << endl;
	cout << "NUMPAD 2 = UNLIMITED POINTS(1000000)" << endl;
	cout << "NUMPAD 3 = GODMODE" << endl;
}

void appHotkeys()
{
	int iAmmo = 50;
	int iPoints = 1000000;
	int iGodmode = 1000000;
	WriteProcessMemory();
	while (true)
	{
		if (GetAsyncKeyState(VK_ESCAPE))
		{
			cout << "Closing and freeing memory..." << endl;
			Sleep(5000);
			exit(1);
		}
		if (GetAsyncKeyState(VK_NUMPAD1))
		{
			Sleep(1000);
			//hacks under here... (writeprocess)
			WriteProcessMemory(hProcess, (LPVOID)0x0147B7FB98, &iAmmo, (DWORD)sizeof(iAmmo), NULL); //primary clip

		}
		if (GetAsyncKeyState(VK_NUMPAD2))
		{
			Sleep(1000);
			//hacks under here... (writeprocess)
			WriteProcessMemory(hProcess, (LPVOID)0x0147B96374, &iPoints, (DWORD)sizeof(iAmmo), NULL); //zombie points
		}
		if (GetAsyncKeyState(VK_NUMPAD3))
		{
			WriteProcessMemory(hProcess, (LPVOID)0x0147621428, &iGodmode, (DWORD)sizeof(iGodmode), NULL);//player health
		}
	}
}

int main()
{
	appTitle();
	appFeatures();
	appHotkeys();
}