pub type PWINBIO_EVENT_CALLBACK = Option<unsafe extern "system" fn(eventcallbackcontext: *const c_void, operationstatus: HRESULT, event: *const WINBIO_EVENT)>;

Aliased Type§

enum PWINBIO_EVENT_CALLBACK {
    None,
    Some(unsafe extern "system" fn(_: *const c_void, _: HRESULT, _: *const WINBIO_EVENT)),
}

Variants§

§1.0.0

None

No value.

§1.0.0

Some(unsafe extern "system" fn(_: *const c_void, _: HRESULT, _: *const WINBIO_EVENT))

Some value of type T.