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/*! A message-only window enables you to send and receive messages. It is not visible, has no z-order, cannot be enumerated, and does not receive broadcast messages. The window simply dispatches messages. A MessageWindow do not have any builder parameter, but still provides the API for the derive macro. Requires the `message-window` feature. ## Example ``` use native_windows_gui as nwg; let mut window = Default::default(); nwg::MessageWindow::builder().build(&mut window); ``` When making a system-tray application (with TrayNotification), this is the recommended top level window type. */ use super::ControlHandle; use crate::win32::window::create_message_window; use crate::NwgError; /** A message only top level window. At least one top level window is required to make a NWG application. See the module documentation */ #[derive(Default, PartialEq, Eq)] pub struct MessageWindow { pub handle: ControlHandle } impl MessageWindow { pub fn builder() -> MessageWindowBuilder { MessageWindowBuilder {} } } impl Drop for MessageWindow { fn drop(&mut self) { self.handle.destroy(); } } pub struct MessageWindowBuilder { } impl MessageWindowBuilder { pub fn build(self, out: &mut MessageWindow) -> Result<(), NwgError> { *out = Default::default(); out.handle = create_message_window()?; Ok(()) } }