Add platform specific settings

winit/src/settings/windows.rs

@@ -0,0 +1,9 @@
+#![cfg(target_os = "windows")]
+//! Platform specific settings for Windows.
+
+/// The platform specific window settings of an application.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+pub struct PlatformSpecific {
+    /// Parent Window
+    pub parent: Option<winapi::shared::windef::HWND>,
+}