Function SetupDiGetClassDescriptionExW
pub unsafe fn SetupDiGetClassDescriptionExW<P4>(
classguid: *const GUID,
classdescription: &mut [u16],
requiredsize: Option<*mut u32>,
machinename: P4,
reserved: Option<*const c_void>,
) -> Result<()>where
P4: Param<PCWSTR>,