CODEWITHSUNDEEP
windowswinapi
zzz
zzz

Reputation: 161

Windows header file <Windows.h> with WIN32_LEAN_AND_MEAN

#include <Windows.h>
#define WIN32_LEAN_AND_MEAN

Why the above code statement has mistake? Is the order wrong or others?

Upvotes: 0

Views: 4270

Answers (2)

Nic007
Nic007

Reputation: 634

In the Windows.h header, if WIN32_LEAN_AND_MEAN is not defined, the preprocessor will includes other headers. So if you want to not include theses headers, you must define WIN32_LEAN_AND_MEAN before #include , else it won't have any effects

#ifndef WIN32_LEAN_AND_MEAN
#include <cderr.h>
#include <dde.h>
#include <ddeml.h>
#include <dlgs.h>
#ifndef _MAC
    #include <lzexpand.h>
    #include <mmsystem.h>
    #include <nb30.h>
    #include <rpc.h>
#endif
#include <shellapi.h>
#ifndef _MAC
    #include <winperf.h>
    #include <winsock.h>
#endif
#ifndef NOCRYPT
    #include <wincrypt.h>
    #include <winefs.h>
    #include <winscard.h>
#endif

#ifndef NOGDI
    #ifndef _MAC
        #include <winspool.h>
        #ifdef INC_OLE1
            #include <ole.h>
        #else
            #include <ole2.h>
        #endif /* !INC_OLE1 */
    #endif /* !MAC */
    #include <commdlg.h>
#endif /* !NOGDI */
#endif /* WIN32_LEAN_AND_MEAN */

Directly from Windows.h

Upvotes: 6

RichieHindle
RichieHindle

Reputation: 281515

The order is wrong. WIN32_LEAN_AND_MEAN affects what windows.h declares, so it needs to be defined before windows.h is included:

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

Upvotes: 4

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