Type Alias SPNOTIFYCALLBACK

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

Aliased Type

pub enum SPNOTIFYCALLBACK {
    None,
    Some(unsafe extern "system" fn(usize, isize)),
}

Variants

None

No value.

Some(unsafe extern "system" fn(usize, isize))

Some value of type T.