Glad and WGL

[Josh Phillips via Digitalmars-d-learn]

So I started using Glad but I can't get WGL to work with it, 
though I think this is more of a Win32 issue than WGL.

wndclass.lpfnWndProc   = &WndProc;

Gives me an error no matter what:
Error: cannot implicitly convert expression (& WndProc) of type 
int function(void* hWnd, uint message, uint wParam, int lParam) 
to extern (Windows) int function(void*, uint, uint, int) nothrow

I think the error has to do with the nothrow but I tried making 
the function empty

extern(Windows)
LRESULT WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM 
lParam)
{
    return 0;
}

And still got the same exact error. Any ideas/help?