Type Alias MSGBOXCALLBACK

pub type MSGBOXCALLBACK = Option<unsafe extern "C" fn(lpHelpInfo: LPHELPINFO)>;

Aliased Type

enum MSGBOXCALLBACK {
    None,
    Some(unsafe extern "C" fn(_: *mut tagHELPINFO)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut tagHELPINFO))

Some value of type T.