Type Alias BFFCALLBACK
pub type BFFCALLBACK = Option<unsafe extern "system" fn(hwnd: HWND, umsg: u32, lparam: LPARAM, lpdata: LPARAM) -> i32>;Aliased Type§
pub enum BFFCALLBACK {
None,
Some(unsafe extern "system" fn(HWND, u32, LPARAM, LPARAM) -> i32),
}