add comments

examples/host_object.rs

@@ -11,11 +11,11 @@ use wry::WebViewBuilder;
 
 #[cfg(target_os = "windows")]
 fn main() -> wry::Result<()> {
-  use wry::WebViewExtWindows;
 
   let event_loop = EventLoop::new();
   let window = WindowBuilder::new().build(&event_loop).unwrap();
 
+  use wry::WebViewExtWindows;
   use windows::{
     core::{w, BSTR},
     Win32::{
@@ -30,6 +30,8 @@ fn main() -> wry::Result<()> {
     }
   };
   use std::mem::ManuallyDrop;
+
+  // This is a simple usage example. add_host_object_to_script is a mapping of the native [addHostObjectToScript](https://learn.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2#addhostobjecttoscript) method of webview2. It requires manual creation of hostobject and memory management. Please use it with caution.
   struct Variant(VARIANT);
   impl Variant {
       pub fn new(num: VARENUM, contents: VARIANT_0_0_0) -> Variant {