Type Alias WNDPROC 

pub type WNDPROC = Option<unsafe extern "C" fn(arg1: HWND, arg2: UINT, arg3: WPARAM, arg4: LPARAM) -> LRESULT>;

Aliased Type

pub enum WNDPROC {
    None,
    Some(unsafe extern "C" fn(*mut HWND__, u32, u64, i64) -> i64),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut HWND__, u32, u64, i64) -> i64)

Some value of type T.