Type Alias windows_sys::Win32::Media::Multimedia::LPMMIOPROC

pub type LPMMIOPROC = Option<unsafe extern "system" fn(lpmmioinfo: PCSTR, umsg: u32, lparam1: LPARAM, lparam2: LPARAM) -> LRESULT>;

Required features: "Win32_Foundation"

Aliased Type

enum LPMMIOPROC {
    None,
    Some(unsafe extern "system" fn(_: *const u8, _: u32, _: isize, _: isize) -> isize),
}

Variants

None

No value.

Some(unsafe extern "system" fn(_: *const u8, _: u32, _: isize, _: isize) -> isize)

Some value of type T.