Hello again!
This is my try at getting the opcode assembly instruction MOV out of a function by analyzing bytes of the function size. Currently it does not return anything , just a blank screen. I cannot really see the problem. If anyone could give me some pointers it would be insanely helpful.
Thanks in advance.

Code:
#include <iostream>
#include <Windows.h>
#include <ctime>
#include <vector>

#define PUSH 0x50
#define POP  0x58
#define MOV  0xB8
#define NOP  0x90
#define ADD  0x01
#define AND  0x21
#define XOR  0x31
#define OR   0x09
#define SBB  0x19
#define SUB  0x29

using namespace std;

int add(int x, int y)
{
	int result;
	__asm
	{
		mov eax, x
		add eax, y
		mov result, eax
		xor eax, eax		
	}
	return result;
}

void stub() { return; }

DWORD GetFunctionSize(DWORD* functionStartAddress, DWORD* stub)
{
	DWORD dwOldProtect;
	DWORD *func, *stubAddr;

	func = (DWORD*)functionStartAddress;
	stubAddr = (DWORD*)stub;

	DWORD size = func - stubAddr;
	VirtualProtect(func, size, PAGE_EXECUTE_READWRITE, &dwOldProtect);
	return size;
}

void GetCurrentByte(PVOID function)
{
	vector<PBYTE> currByte;

	PBYTE pCurrentByte = (PBYTE)function;
	if (*pCurrentByte == MOV)
	{
		cout << "MOV instr.\n";
	}
	currByte.push_back(pCurrentByte);
}

int main()
{

	DWORD size = GetFunctionSize((DWORD*)&add, (DWORD*)&stub);
	
	for (int i = 0; i < size; i++)
	{
		GetCurrentByte(add);
	}
	system("pause");
	return 0;
}