Function SetupDiGetClassDevsExA

pub unsafe extern "system" fn SetupDiGetClassDevsExA(
    ClassGuid: *const GUID,
    Enumerator: PCSTR,
    hwndParent: HWND,
    Flags: DWORD,
    DeviceInfoSet: HDEVINFO,
    MachineName: PCSTR,
    Reserved: PVOID,
) -> HDEVINFO