pub type LINECALLBACK = Option<unsafe extern "system" fn(hdevice: u32, dwmessage: u32, dwinstance: usize, dwparam1: usize, dwparam2: usize, dwparam3: usize)>;

Aliased Type§

enum LINECALLBACK {
    None,
    Some(unsafe extern "system" fn(_: u32, _: u32, _: usize, _: usize, _: usize, _: usize)),
}

Variants§

§1.0.0

None

No value.

§1.0.0

Some(unsafe extern "system" fn(_: u32, _: u32, _: usize, _: usize, _: usize, _: usize))

Some value of type T.