Type Alias LPFNBUTTON
pub type LPFNBUTTON = Option<unsafe extern "system" fn(uluiparam: usize, lpvcontext: *mut c_void, cbentryid: u32, lpselection: *mut ENTRYID, ulflags: u32) -> i32>;Aliased Type§
pub enum LPFNBUTTON {
None,
Some(unsafe extern "system" fn(usize, *mut c_void, u32, *mut ENTRYID, u32) -> i32),
}