Function winapi::um::setupapi::SetupDiGetClassDescriptionExW

pub unsafe extern "system" fn SetupDiGetClassDescriptionExW(
    ClassGuid: *const GUID, 
    ClassDescription: PWSTR, 
    ClassDescriptionSize: DWORD, 
    RequiredSize: PDWORD, 
    MachineName: PCWSTR, 
    Reserved: PVOID
) -> BOOL