fix msgbox

Author: Mikachu2333

build.rs

@@ -16,7 +16,7 @@ fn main() {
     #[cfg(windows)]
     {
         let mut res = winres::WindowsResource::new();
-        res.set("FileDescription", "Starter for ScreenCapture");
+        res.set("FileDescription", "Starter of ScreenCapture");
         res.set(
             "LegalCopyright",
             "Copyright (C) Mikachu2333 2025-2026. MIT License.",

src/msgbox.rs

@@ -47,8 +47,16 @@ extern "system" {
     ) -> i32;
     fn FindWindowW(lpClassName: LPCWSTR, lpWindowName: LPCWSTR) -> HWND;
     fn PostMessageW(hWnd: HWND, Msg: UINT, wParam: WPARAM, lParam: LPARAM) -> BOOL;
+    fn CreateWindowExW(
+        dwExStyle: u32, lpClassName: *const u16, lpWindowName: *const u16,
+        dwStyle: u32, x: i32, y: i32, nWidth: i32, nHeight: i32,
+        hWndParent: HWND, hMenu: isize, hInstance: isize, lpParam: *mut std::ffi::c_void,
+    ) -> HWND;
+    fn DestroyWindow(hWnd: HWND) -> i32;
 }
 
+const HWND_MESSAGE: HWND = -3; // Message-only window parent
+
 /// Button combinations for message boxes
 #[allow(dead_code)]
 enum MsgBtnType {
@@ -424,6 +432,51 @@ pub fn show_notification(
         NotifyIconType::Error => NIIF_ERROR,
     };
 
+    let title_w = to_wide(title.to_string());
+    let msg_w = to_wide(msg.to_string());
+    let tip_w = to_wide(PROCESS_NAME);
+
+    // Set tooltip (shown on hover)
+    for (i, &c) in tip_w.iter().take(127).enumerate() {
+        nid.szTip[i] = c;
+    }
+    // Set balloon title
+    for (i, &c) in title_w.iter().take(63).enumerate() {
+        nid.szInfoTitle[i] = c;
+    }
+    // Set balloon message
+    for (i, &c) in msg_w.iter().take(255).enumerate() {
+        nid.szInfo[i] = c;
+    }
+
+    // First, try to delete any existing icon with the same ID (cleanup from previous calls)
+    unsafe { Shell_NotifyIconW(NIM_DELETE, &nid) };
+
+    // 创建一个仅用于接收消息的隐藏系统窗口 (Message-only window)
+    let class_name = to_wide("STATIC"); // 使用系统自带静态类
+    let hwnd = unsafe {
+        CreateWindowExW(
+            0,
+            class_name.as_ptr(),
+            ptr::null(), // 无名
+            0, 0, 0, 0, 0,
+            HWND_MESSAGE, 
+            0, 0, ptr::null_mut()
+        )
+    };
+
+    let mut nid: NOTIFYICONDATAW = unsafe { std::mem::zeroed() };
+    nid.cbSize = std::mem::size_of::<NOTIFYICONDATAW>() as u32;
+    nid.hWnd = hwnd;
+    nid.uID = STANDALONE_NOTIFY_ICON_ID;
+    nid.uFlags = NIF_ICON | NIF_TIP | NIF_INFO;
+    nid.hIcon = unsafe { LoadIconW(0, IDI_APPLICATION) };
+    nid.dwInfoFlags = match icon_type {
+        NotifyIconType::Info => NIIF_INFO,
+        NotifyIconType::Warning => NIIF_WARNING,
+        NotifyIconType::Error => NIIF_ERROR,
+    };
+
     let title_w = to_wide(title);
     let msg_w = to_wide(msg);
     let tip_w = to_wide(PROCESS_NAME);
@@ -455,9 +508,12 @@ pub fn show_notification(
         thread::sleep(std::time::Duration::from_millis(timeout_ms));
         let mut cleanup_nid: NOTIFYICONDATAW = unsafe { std::mem::zeroed() };
         cleanup_nid.cbSize = std::mem::size_of::<NOTIFYICONDATAW>() as u32;
-        cleanup_nid.hWnd = 0;
+        cleanup_nid.hWnd = hwnd; // 对应当初的hwnd
         cleanup_nid.uID = STANDALONE_NOTIFY_ICON_ID;
-        unsafe { Shell_NotifyIconW(NIM_DELETE, &cleanup_nid) };
+        unsafe { 
+            Shell_NotifyIconW(NIM_DELETE, &cleanup_nid);
+            DestroyWindow(hwnd); // 释放伪窗口
+        };
     });
 
     true