C / C++ / MFC

int nSize = MultiByteToWideChar(CP_UTF8,0,pstrValue,-1,NULL,0);
if ( nSize == 0 )
    return;

WCHAR * pBuffer= new WCHAR[nSize];
MultiByteToWideChar(CP_UTF8,0,pstrValue,-1,pBuffer,nSize);

// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
#pragma once

#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers

#define _AFXDLL
#include afxsock.h
#include stdio.h
#include tchar.h
#include winsock2.h
#include ws2tcpip.h
// TODO: reference additional headers your program requires 

// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently,
// but are changed infrequently

#pragma once

#define WM_MYTHREADMESSAGE (WM_USER+1)

#ifndef _SECURE_ATL
#define _SECURE_ATL 1
#endif

#ifndef VC_EXTRALEAN
#define VC_EXTRALEAN		// Exclude rarely-used stuff from Windows headers
#endif

// Modify the following defines if you have to target a platform prior to the ones specified below.
// Refer to MSDN for the latest info on corresponding values for different platforms.
#ifndef WINVER				// Allow use of features specific to Windows XP or later.
#define WINVER 0x0501		// Change this to the appropriate value to target other versions of Windows.
#endif

#ifndef _WIN32_WINNT		// Allow use of features specific to Windows XP or later.                   
#define _WIN32_WINNT 0x0501	// Change this to the appropriate value to target other versions of Windows.
#endif						

#ifndef _WIN32_WINDOWS		// Allow use of features specific to Windows 98 or later.
#define _WIN32_WINDOWS 0x0410 // Change this to the appropriate value to target Windows Me or later.
#endif

#ifndef _WIN32_IE			// Allow use of features specific to IE 6.0 or later.
#define _WIN32_IE 0x0600	// Change this to the appropriate value to target other versions of IE.
#endif

#define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS	// some CString constructors will be explicit

// turns off MFC's hiding of some common and often safely ignored warning messages
#define _AFX_ALL_WARNINGS


#include afxwin.h	// MFC core and standard components
//#include windows.h
#include afxext.h // MFC extensions

#include afxdisp.h      // MFC Automation classes


#ifndef _AFX_NO_OLE_SUPPORT
#include afxdtctl.h	// MFC support for Internet Explorer 4 Common Controls
#endif
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include afxcmn.h		// MFC support for Windows Common Controls
#endif // _AFX_NO_AFXCMN_SUPPORT