pub type HCN_NOTIFICATION_CALLBACK = Option<unsafe extern "system" fn(notificationtype: u32, context: *const c_void, notificationstatus: HRESULT, notificationdata: PCWSTR)>;

Aliased Type§

enum HCN_NOTIFICATION_CALLBACK {
    None,
    Some(unsafe extern "system" fn(_: u32, _: *const c_void, _: HRESULT, _: PCWSTR)),
}

Variants§

§1.0.0

None

No value.

§1.0.0

Some(unsafe extern "system" fn(_: u32, _: *const c_void, _: HRESULT, _: PCWSTR))

Some value of type T.