Question

I’m writing a small Win32 application in Visual Studio C/C++ that talks to a HID device using the WDK.

I’ve added the following include directories in Options > Projects and Solutions > VC++ Directories:

D:\WinDDK\7600.16385.1\inc\ddk
D:\WinDDK\7600.16385.1\inc\api

And the following library directory:

D:\WinDDK\7600.16385.1\lib\win7\i386

I also set the following lib file to Project Properties > Configuration Properties > Linker > Additional Dependencies:

hid.lib

But when I try to compile, I get:

error LNK2028: unresolved token (0A000040) "unsigned char __stdcall HidD_SetOutputReport(void *,void *,unsigned long)" ...

Although, this should be in hid.lib

Am I missing something ?

— Update —
At the suggestion of SooWeiTan I enabled Properties->Linker->Show Progress and now I see here the following:

1>    Searching C:\Program Files\Microsoft SDKs\Windows\v6.0A\\lib\MSCOREE.lib:
1>      Found __CorExeMain@0
1>        Loaded MSCOREE.lib(mscoree.dll)
1>      Found __IMPORT_DESCRIPTOR_mscoree
1>        Referenced in MSCOREE.lib(mscoree.dll)
1>        Loaded MSCOREE.lib(mscoree.dll)
1>      Found mscoree_NULL_THUNK_DATA
1>        Referenced in MSCOREE.lib(mscoree.dll)
1>        Loaded MSCOREE.lib(mscoree.dll)
1>    Searching D:\WinDDK\7600.16385.1\lib\win7\i386\hid.lib:
1>    Searching C:\Program Files\Microsoft SDKs\Windows\v6.0A\\lib\kernel32.lib:
...
...
...

From this, I interpret that it doesn’t find anything interesting in the hid.lib, whereas it should find my trouble function… Any idea why this could happen ?

Answer 1

I’m ashamed to say that I found the problem :(. I’m C\C++ noob, but still …

When I was importing the C modules inside the c++ files, there was no extern "C" arround the include 😐