Type Alias SPNOTIFYCALLBACK

pub type SPNOTIFYCALLBACK = Option<unsafe extern "system" fn(wparam: WPARAM, lparam: LPARAM)>;

Aliased Type

enum SPNOTIFYCALLBACK {
    None,
    Some(unsafe extern "system" fn(_: WPARAM, _: LPARAM)),
}

Variants

None

No value.

Some(unsafe extern "system" fn(_: WPARAM, _: LPARAM))

Some value of type T.