Type Alias windows_sys::Win32::UI::WindowsAndMessaging::WNDPROC

pub type WNDPROC = Option<unsafe extern "system" fn(param0: HWND, param1: u32, param2: WPARAM, param3: LPARAM) -> LRESULT>;

Required features: "Win32_Foundation"

Aliased Type

enum WNDPROC {
    None,
    Some(unsafe extern "system" fn(_: isize, _: u32, _: usize, _: isize) -> isize),
}

Variants

None

No value.

Some(unsafe extern "system" fn(_: isize, _: u32, _: usize, _: isize) -> isize)

Some value of type T.