Type Alias BFFCALLBACK

pub type BFFCALLBACK = Option<unsafe extern "system" fn(hwnd: HWND, umsg: u32, lparam: LPARAM, lpdata: LPARAM) -> i32>;

Aliased Type

enum BFFCALLBACK {
    None,
    Some(unsafe extern "system" fn(_: HWND, _: u32, _: LPARAM, _: LPARAM) -> i32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(_: HWND, _: u32, _: LPARAM, _: LPARAM) -> i32)

Some value of type T.