C / C++ / MFC

#define UNICODE
#define _UNICODE
#include <windows.h>
#include <tchar.h>
#include <io.h>
#include <fcntl.h>
#include <stdio.h>

void pint(int);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, 
    LPSTR lpCmdLine, int nCmdShow)
{
	
	int f,len;	
	char str[100];
	TCHAR tstr[100];

	f = open("c:\\uni.txt",O_RDONLY|O_BINARY);
	len = read(f,str,50);
	close(f);
	str[len] = '\0';
	tstr[len] = 0;

	pint(len);
	MultiByteToWideChar(CP_ACP, 0, str, len, tstr, len);
	
    MessageBoxW(NULL, tstr, _T("Note"), MB_OK);

	
    return 0;
}

void pint(int src)
{
    char buff[512];
    TCHAR tbuff[512];
    int len;

    itoa(src,buff,10);
    len = strlen(buff);
    buff[len] = 0;
    tbuff[len] = 0;

    MultiByteToWideChar(CP_ACP, 0, buff, len, tbuff, 512);
    MessageBoxW(NULL,tbuff,_T("PINT"),MB_OK);
}

/nologo /MLd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /Fp"Debug/uni.pch" /YX /Fo"Debug/" /Fd"Debug/" /FD /GZ /c 

WIN32,_DEBUG,_WINDOWS,_MBCS