Compilation errors with VS-2019

Question

The code below does not compile. I get two errors:

    _TCHAR* pStrAddress;
    ... some stuff here...
    IN_ADDR  sa;
    InetPton(AF_INET, pStrAddress, &sa);
    *pIP = sa.S_un.S_addr;

1) IN_ADDR --> error C2065: 'AF_INET': undeclared identifier

2) InetPton(...) --> C3861: 'InetPton': identifier not found

My configuration is as follows:

VS-2019 pro
Windows SDK 10.0.18362.0 (Latest as of 9/26/2019)
When I press F12 (Go to definition) the following files opens in the editor (C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\shared\inaddr.h and C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\um\WS2tcpip.h).
The project settings "C/C++ | General | Additional include directories" has the "Inherit from parent or project default" checkbox checked.
Ws2_32.lib is present in "linker | Additional dependencies" (but my question is not about link issue, or not there yet)
My program uses unicode and InetPton(...) expands to InetPtonW, which is correct.

To resume, from within the editor, the symbols are accessible, but the preprosessor/compiler don't seem to have the same paths. Obviously I am missing something most probably obvious. Your help will be immensely appreciated.

Thanks!

Find the header files defining `AF_INET` and `InetPton`. Include them in your source file. — Thomas Matthews, Sep 27 '19 at 00:20
Yep, I tried but no change. The includes statements are as follows (usual order) #include #include #include — BlackEagle, Sep 27 '19 at 00:21
There are many ways this can occur. We need all the code so that we can copy and paste it to reproduce the error. [Edit] the question to include a [mre]. — 1201ProgramAlarm, Sep 27 '19 at 00:34

score 1 · Accepted Answer · answered Sep 27 '19 at 01:12

Found it! I created a small project with just the code of interest to post as an example of code and everything was compiling fine. So, something must be obvious in the first place. Then it hit me!: The precompiled header was not the first include.

Thanks guys for your help!

BAD code:

    #include <windows.h>
    #include <ws2tcpip.h>
    #include <stdlib.h>

    #include "pch.h"   <-- this must be the first include!!!!!!

GOOD code:

    #include "pch.h"   <-- ok, happy compiler and developer  ;)

    #include <windows.h>
    #include <ws2tcpip.h>
    #include <stdlib.h>

Compilation errors with VS-2019

1 Answers1