Type Alias ACMFORMATCHOOSEHOOKPROCA 

pub type ACMFORMATCHOOSEHOOKPROCA = Option<unsafe extern "system" fn(hwnd: HWND, umsg: u32, wparam: WPARAM, lparam: LPARAM) -> u32>;

Aliased Type

pub enum ACMFORMATCHOOSEHOOKPROCA {
    None,
    Some(unsafe extern "system" fn(HWND, u32, WPARAM, LPARAM) -> u32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(HWND, u32, WPARAM, LPARAM) -> u32)

Some value of type T.