How to fix this error ? undefined reference to `IID_IMultiLanguage'

[ChrisW67]

The second solution :

win32:LIBS += -LC:/Windows/system32/mlang.dll

win32:LIBS += -LC:/Windows/system32/mlang.dll

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doesn't change anything.

That isn't quite what I wrote, but I expect that what I wrote will not work either.

// What I wrote explicitly lists the library file full path
win32: LIBS += C:/Windows/system32/mlang.dll
// and you could also try this search path (-L) and lib (-l) variation
win32: LIBS += -LC:/Windows/system32 -lmlang

// What I wrote explicitly lists the library file full path
win32: LIBS += C:/Windows/system32/mlang.dll
// and you could also try this search path (-L) and lib (-l) variation
win32: LIBS += -LC:/Windows/system32 -lmlang

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I also tried to make the import library and it also doesn't succeed . I think that the mlang dll isn't compatible with the dlltool of MinGW.

Or maybe i don't known how to do it.

I think the only option is to hand craft a DEF file and make the import library yourself. You'd need the docs for the mlang library (link in my earlier reply) and perserverance. You could start with this:
http://code.google.com/p/win-iconv/s.../mlang.def?r=5
and see how you get on.