c2653 no class or namespace .hpp/.cpp - c++

Question

Hey I'm a C++ beginner and trying to learn the basics. I tried to compile my code but it keeps telling me
error. (c2653) "Framework": no class or namespace in line 4.
Another error is
"sf":no class or namespace
but if I add #include <SFML\Graphics.hpp> to my Framework.cpp code it solve the problem. As I understand the .hpp headers include all the code to the cpp files. So why should I include the SFML\Graphics.hpp twice?
Here is my Code:
#ifndef FRAMEWORKK_H
#define FRAMEWORKK_H
#include <iostream>
#include <SFML\Graphics.hpp>
#include "stdafx.h"
class Framework
{
public:
Framework();
~Framework();
void run();
private:
void quit();
void update();
void handleEvent();
void render();
sf::RenderWindow * pRenderWindow;
sf::Event * pMainEvent;
bool mRun;
};#endif
and here is my .cpp code
#include "Frameworkk.h"
#include "stdafx.h"
Framework::Framework(){
pRenderWindow = new sf::RenderWindow(sf::VideoMode(800, 600, 32),
"Spiel");
pMainEvent = new sf::Event;
mRun = true;
}
Framework::~Framework()
{
}
void Framework::run()
{
while (mRun)
{
update();
handleEvent();
render();
quit();
}
}
void Framework::quit()
{
if (!mRun)
{
pRenderWindow->close();
}
}
void Framework::update()
{
}
void Framework::handleEvent()
{
while (pRenderWindow->pollEvent(*pMainEvent))
{
if (pMainEvent->type == sf::Event::Closed)
{
mRun = false;
}
}
}
void Framework::render()
{
pRenderWindow->clear(sf::Color(120, 120, 120));
pRenderWindow->display();
}