Fix process not existing successfully (#11)

src/lib.rs

@@ -1,5 +1,6 @@
 use std::{
  ffi::OsString,
+ mem::ManuallyDrop,
  os::windows::prelude::{OsStrExt, OsStringExt},
  path::{Path, PathBuf},
 };
@@ -51,7 +52,7 @@ pub struct Monitor {
 
 #[derive(Debug)]
 pub struct DesktopWallpaper {
- interface: IDesktopWallpaper,
+ interface: ManuallyDrop<IDesktopWallpaper>,
 }
 
 impl DesktopWallpaper {
@@ -61,7 +62,9 @@ impl DesktopWallpaper {
  CoCreateInstance(&DesktopWallpaper, None, CLSCTX_LOCAL_SERVER)?
  };
 
- Ok(Self { interface })
+ Ok(Self {
+ interface: ManuallyDrop::new(interface),
+ })
  }
 
  pub fn get_monitors(&self) -> Result<Vec<Monitor>> {
@@ -138,6 +141,7 @@ impl DesktopWallpaper {
 impl Drop for DesktopWallpaper {
  fn drop(&mut self) {
  unsafe {
+ ManuallyDrop::drop(&mut self.interface);
  CoFreeUnusedLibraries();
  CoUninitialize();
  }