Type Alias PHONECALLBACK
pub type PHONECALLBACK = Option<unsafe extern "system" fn(hdevice: u32, dwmessage: u32, dwinstance: usize, dwparam1: usize, dwparam2: usize, dwparam3: usize)>;Aliased Type§
pub enum PHONECALLBACK {
None,
Some(unsafe extern "system" fn(u32, u32, usize, usize, usize, usize)),
}