windows_sys::Win32::Media::Multimedia

Type Alias LPMMIOPROC

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

Aliased Type§

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

Variants§

§1.0.0

None

No value.

§1.0.0

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

Some value of type T.