Question

I’m getting this linker error when compiling wxWidgets in Visual Studio 2010.

msvcrt.lib(wcrtexew.obj) : error LNK2001: unresolved external symbol _wWinMain@16

Now here’s the problem. The entry point for wxWidgets is this macro:

IMPLEMENT_APP(MyApp)

Which means I don’t use wWinMain() as an entry.

I’ve tried disabling the entry point when I compile (/NOENTRY), but no dice. Nothing seems to work because if I define wWinMain(), then wxWidgets won’t start because the entry is IMPLEMENT_APP.

I only receive this error when I compile as static. If I don’t compile as static I’ll have to supply the DLLs: msvcp100d.dll and msvcr100d.dll on Windows Server 2008 (and maybe more DLLs on older versions of Windows that don’t have the library installed).

Now I understand I am linking again the debug library, but it shouldn’t matter if I link again the release because I should receive the same error (unresolved external symbol _wWinMain@16).

Any solutions?

Answer 1

First compile wxWidgets’ Library (wxWidgets\build\msw) all with the same settings you have in your project. So I enable “/MT”, “Use MFC in a Static Library”, and output the projects as “Release”. Same exact settings on my wxWidgets’ application I coded.

Now Comment out:

IMPLEMENT_APP(MyApp)

And use this for your entry point:

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE prevInstance, LPWSTR lpCmdLine, int nShowCmd)
{
    char *buf;

    buf = new char[wcslen(lpCmdLine) + 1];

    wcstombs(buf, lpCmdLine, wcslen(lpCmdLine) +1);

    wxApp::SetInstance( new MyApp());

    wxEntry(hInstance, prevInstance, buf, nShowCmd);

    wxEntryCleanup();
}