scan a page via WIA in vc++ got an error

Question

I saw this way of coding in Microsoft " WIA tutorial " page but the vc++ doesn't let me to compile it! some errors appear all the time!

#include "stdafx.h"
#include <Strsafe.h>
#include <Wia.h>
#include <WinError.h>

bool CreateWiaDeviceManager( IWiaDevMgr2 **ppWiaDevMgr ){
//
// Validate arguments
//
if (NULL == ppWiaDevMgr)
{
    return E_INVALIDARG;
}
//
// Initialize out variables
//
*ppWiaDevMgr = NULL;

//
// Create an instance of the device manager
//


//Vista or later:
HRESULT hr = CoCreateInstance( CLSID_WiaDevMgr2, NULL, CLSCTX_LOCAL_SERVER, IID_IWiaDevMgr2, (void**)ppWiaDevMgr ); 

//
// Return the result of creating the device manager
//
return SUCCEEDED(hr);
}

There are errors:

1>WIAScanner.cpp(11): error C2065: 'IWiaDevMgr2' : undeclared identifier 1>WIAScanner.cpp(11): error C2065: 'ppWiaDevMgr' : undeclared identifier 1>WIAScanner.cpp(11): error C2448: 'CreateWiaDeviceManager' : function-style initializer appears to be a function definition

Thanks for your attention.

Answer 1

IWiaDevMgr2 is only available in Windows Vista or later, so you need to target your project appropriately: _WIN32_WINNT needs to be defined as 0x0600 or greater.