Помогите новичку - в чем ошибка?

//-------------------------------------------------
файл SPMainWin.h

#include "SPSettings.h"

void InitSettings();

//-------------------------------------------------
файл SPMainWin.cpp

#include "SPMainWin.h"

void InitSettings()
{
MainSettings.SCREEN_WIDTH = 640;
MainSettings.SCREEN_HEIGHT = 480;
MainSettings.TITLE = "SP";
}


int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
InitSettings();
}

//-------------------------------------------------

файл SPSettings.h

#pragma once

#include <string>

class SPSettings {

public:
SPSettings(void);
~SPSettings(void);

typedef std::basic_string<char> TITLE;
typedef unsigned int SCREEN_WIDTH;
typedef unsigned int SCREEN_HEIGHT;
};

extern SPSettings MainSettings;
//-------------------------------------------------
файл SPSettings.cpp

#include "SPSettings.h"

SPSettings MainSettings;

SPSettings::SPSettings(void)
{
}

SPSettings::~SPSettings(void)
{
}
//-------------------------------------------------




Получаю ошибку

SPMainWin.cpp(20): error C2274: 'function-style cast' : illegal as right side of '.' operator
SPMainWin.cpp(21): error C2274: 'function-style cast' : illegal as right side of '.' operator
SPMainWin.cpp(22): error C2274: 'function-style cast' : illegal as right side of '.' operator

Может подскажете - в чем я не прав?