Type Alias LPFNBUTTON 

pub type LPFNBUTTON = Option<unsafe extern "system" fn(usize, *mut c_void, u32, *mut ENTRYID, u32) -> i32>;

Aliased Type

pub enum LPFNBUTTON {
    None,
    Some(unsafe extern "system" fn(usize, *mut c_void, u32, *mut ENTRYID, u32) -> i32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(usize, *mut c_void, u32, *mut ENTRYID, u32) -> i32)

Some value of type T.