I wish c++, was a little more specific on the messages they give. The following error is being thrown in the document below

main.h

#ifndef main_h
#define main_h

//includes
#include    <windows.h>
#include    <commctrl.h>
#include    <d3d9.h>
#include    <fstream>

#include "capplication.h"

//constants
#define TITLE "D3D Tut 01: Create Window"
#define WINDOW_X 350
#define WINDOW_Y 320

//Button ID's
#define ID_START 1
#define ID_CANCEL 2

//globals
extern CApplication g_App;

//function prototypes
LRESULT CALLBACK        WindowProcedure(HWND,UINT,WPARAM,LPARAM);

#endif

The only header file that could possible throw this error is the capplication.h. given below

capplication.h

#ifndef capplication_h
#define capplication_h

#include"main.h"

class CApplication
{
public:
                        CApplication(void);
                        ~CApplication(void);

    void                InitWindow(void);
    void                SaveSettings(void);
    void                LoadSettings(void);

    void                KillWindow(void);

    inline bool         GetWindowStatus(void)
                        {
                            return m_bRunningWindow;
                        }

    inline HWND         GetWindowHandle(void)
                        {
                            return m_hWindow;
                        }

    inline void         SetWindowStatus(bool bRunningWindow)
                        {
                            m_bRunningWindow = bRunningWindow;
                        }
private:
    bool                m_bRunningWindow;

    HWND    m_hWindow,
            m_hBtnStart,
            m_hBtnCancel,
            m_hLblResolution,
            m_hCbResolution,
            m_hLblBackBuffer,
            m_hCbBackBuffer,
            m_hLblDepthStencil,
            m_hCbDepthStencil,
            m_hLblVertexProcessing,
            m_hCbVertexProcessing,
            m_hLblMultiSampling,
            m_hCbMultiSampling,
            m_hLblAnisotropy,
            m_hCbAnisotropy;

    DWORD   m_dwWidth,
            m_dwHeight,
            m_dwVertexProcessing,
            m_dwAnisotropy;

    D3DFORMAT           m_ColorFormat,
                        m_DepthStencilFormat;

    D3DMULTISAMPLE_TYPE m_MultiSampling;
};

#endif

Besides that, the only suspicious thing I see is fstream given in the first code. I did have it as fstream.h

But VC++ was not recognizing it so I was told to remove the h and I did. now I am down to this error. and I have no clue what it could be. Possibly something obvious