Cannot load user32.dll from extern C file

[been_1990]

You can always try using GetModuleHandle to get the handle to the already loaded dll if you really do want to use GetProcAddress.

If there is a better way I would definitely go for it.

Did you ever try using GetLastError ?

Yes:

qDebug() << init_raw_mouse(1, 0, 1) // Outputs 0; 
    qDebug() << GetLastError(); // Outputs 0

qDebug() << init_raw_mouse(1, 0, 1) // Outputs 0; 
    qDebug() << GetLastError(); // Outputs 0

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Here they say that if I recompile QT passing -D _WIN32_WINNT=0×501 as arguments, I could filter WM_INPUT messages.
But I still would have to use that C file for the rest of the implementation(to get the different input's and their respective x & y axis).
How can I rebuild QT? Can that happen trough QtCreator? I have VS2010, but don't use it.

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Added after 4 minutes

:

In a Windows application, I can just use RegisterRawInputDevices(), I've never needed to do LoadLibrary/GetProcAddress, as they are standard functions.

This is why I'm confused. It's a standard library.

So if I included windows.h I could trim the code a bit? (I have no idea on Win32 programming.)

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Added after 6 minutes

:
The website I downloaded the demo was here. I'm including the whole app in the attachment.