Type Alias LPMMIOPROC
pub type LPMMIOPROC = Option<unsafe extern "system" fn(lpmmioinfo: PCSTR, umsg: u32, lparam1: LPARAM, lparam2: LPARAM) -> LRESULT>;Aliased Type§
pub enum LPMMIOPROC {
None,
Some(unsafe extern "system" fn(PCSTR, u32, LPARAM, LPARAM) -> LRESULT),
}