Function winapi::um::setupapi::SetupDiGetClassDescriptionExA

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