pub type LPMAPIREADMAIL = Option<unsafe extern "system" fn(usize, usize, PCSTR, u32, u32, *mut *mut MapiMessage) -> u32>;Aliased Type§
pub enum LPMAPIREADMAIL {
None,
Some(unsafe extern "system" fn(usize, usize, PCSTR, u32, u32, *mut *mut MapiMessage) -> u32),
}