What can I do to use wtypes without internal errors?

[Eliseu_CEL]

I have a project that uses legacy code C++ with lots of references to the file wtypes.h. Basically this use the function wsprintf and PALETTEENTRY. If I include this file I get the error C2872 in compile time:

error C2872: 'IServiceProvider' : ambiguous symbol
could be '\Vc7\PlatformSDK\Include\ServProv.h(48) : System::IServiceProvider IServiceProvider'
or 'Stdafx.cpp(0) : System::IServiceProvider'

How can I use wtypes avoiding this error C2872?

[NoHero]

This problem occures because the unmanaged IServiceProvider conflicts with the System::IServiceProvider. You either don't use namespace System or pack the unmanaged included into a namespace.

For example:

// header
namespace unmanaged
{
#   include <windows.h>
}

// source

#include "myheader.h"

unmanaged::GetDlgItem(/*blabla*/);

[Eliseu_CEL]

Thank you NoHere.

Actually what I changed, and now everything is working ok, is that.

Old code:

#pragma once

using namespace System;
using namespace System::Collections;

#pragma unmanaged
#include ".\PDAIncludes\conjpto.h" 
#include ".\PDAIncludes\objeto.h" 
#include ".\PDAIncludes\lista.h"
#include ".\PDAIncludes\radar.h" 
#include ".\PDAIncludes\cvang.h"
#include ".\PDAIncludes\incursor.h"

#pragma managed

namespace IEAv_PDACPP
{

With this I got the Error C2872

New code now:

#pragma once


#pragma unmanaged
#include ".\PDAIncludes\conjpto.h" 
#include ".\PDAIncludes\objeto.h" 
#include ".\PDAIncludes\lista.h"
#include ".\PDAIncludes\radar.h" 
#include ".\PDAIncludes\cvang.h"
#include ".\PDAIncludes\incursor.h"

#pragma managed

using namespace System;
using namespace System::Collections;

and then, I don't get the error anymore.