diff --git a/wfassoc/src/lowlevel.rs b/wfassoc/src/lowlevel.rs
index 9a92204..2385353 100644
--- a/wfassoc/src/lowlevel.rs
+++ b/wfassoc/src/lowlevel.rs
@@ -160,17 +160,21 @@ pub enum IconResVariant {
 impl IconResVariant {
     pub fn extract(&self, kind: concept::IconSizeKind) -> Result<concept::IconRc> {
         let rc = match self {
-            IconResVariant::Plain(v) => concept::IconRc::with_ico_file(v.as_str(), kind)?,
+            IconResVariant::Plain(v) => {
+                eprintln!("plain: {v}");
+                concept::IconRc::with_ico_file(v.as_str(), kind)?
+            },
             IconResVariant::RefStr(v) => {
                 // Try expand path part if possible
-                let path_part = match concept::ExpandString::new(v.get_path()) {
+                let path_part = strip_quote(v.get_path());
+                let path_part = match concept::ExpandString::new(path_part) {
                     Ok(expand_string) => expand_string.expand()?,
-                    Err(_) => v.get_path().to_string(),
+                    Err(_) => path_part.to_string(),
                 };
-                eprintln!("{path_part}");
+                eprintln!("refstr: {path_part}");
                 // Get index part.
                 let index_part = v.get_index();
-                eprintln!("{index_part}");
+                eprintln!("refstr: {index_part}");
                 // Resolve icon resource
                 concept::IconRc::new(&path_part, index_part, kind)?
             },
@@ -229,9 +233,10 @@ impl StrResVariant {
             // For string reference string, we try to resolve it.
             StrResVariant::RefStr(v) => {
                 // Try expand path part if possible
-                let path_part = match concept::ExpandString::new(v.get_path()) {
+                let path_part = strip_quote(v.get_path());
+                let path_part = match concept::ExpandString::new(path_part) {
                     Ok(expand_string) => expand_string.expand()?,
-                    Err(_) => v.get_path().to_string(),
+                    Err(_) => path_part.to_string(),
                 };
                 eprintln!("{path_part}");
                 // Get index part
@@ -413,6 +418,22 @@ fn check_privilege(territory: OpenKeyTerritory, purpose: OpenKeyPurpose) -> Resu
     }
 }
 
+/// Remove quote pair if possible.
+/// 
+/// In some cases, the path part of [concept::IconRefStr] or [concept::StrRefStr] is quoted by quote.
+/// This can no be recognized by Win32 functions.
+/// So in this case, we should remove this quote pair.
+fn strip_quote<'a>(s: &'a str) -> &'a str {
+    let bytes = s.as_bytes();
+    if bytes.len() >= 2 && bytes[0] == b'"' && bytes[bytes.len() - 1] == b'"' {
+        // Because quote is 1 byte in UTF8, we can safely slice it,
+        // without worry about panic.
+        &s[1..s.len() - 1]
+    } else {
+        s
+    }
+}
+
 // endregion
 
 // region: Registry Keys
diff --git a/wfassoc/src/win32/concept.rs b/wfassoc/src/win32/concept.rs
index 2f4d730..ba9ecea 100644
--- a/wfassoc/src/win32/concept.rs
+++ b/wfassoc/src/win32/concept.rs
@@ -373,7 +373,7 @@ impl FromStr for IconRefStr {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         static RE: LazyLock<Regex> = LazyLock::new(|| {
-            Regex::new(r"^([^,@].*),-([0-9]+)$").expect("unexpected bad regex pattern string")
+            Regex::new(r"^([^,@][^,]*),-?([0-9]+)$").expect("unexpected bad regex pattern string")
         });
         let caps = RE.captures(s);
         if let Some(caps) = caps {
@@ -461,7 +461,7 @@ impl FromStr for StrRefStr {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         static RE: LazyLock<Regex> = LazyLock::new(|| {
-            Regex::new(r"^@(.+),-([0-9]+)$").expect("unexpected bad regex pattern string")
+            Regex::new(r"^@([^,]+),-?([0-9]+)$").expect("unexpected bad regex pattern string")
         });
         let caps = RE.captures(s);
         if let Some(caps) = caps {
diff --git a/wfassoc/tests/concept.rs b/wfassoc/tests/concept.rs
index 833782c..7088361 100644
--- a/wfassoc/tests/concept.rs
+++ b/wfassoc/tests/concept.rs
@@ -134,6 +134,13 @@ fn test_icon_ref_str() {
         r#"%SystemRoot%\System32\imageres.dll,-72"#,
         (r#"%SystemRoot%\System32\imageres.dll"#, 72),
     );
+    ok_tester(
+        r#""D:\Software\Krita\Krita (x64)\shellex\kritafile.ico",0"#,
+        (
+            r#""D:\Software\Krita\Krita (x64)\shellex\kritafile.ico""#,
+            0,
+        ),
+    );
     err_tester(r#"C:\Windows\Cursors\aero_arrow.cur"#);
     err_tester(r#"This is my application, OK?"#);
     err_tester(r#"@%SystemRoot%\System32\shell32.dll,-30596"#);
@@ -161,6 +168,10 @@ fn test_str_ref_str() {
         r#"@%SystemRoot%\System32\shell32.dll,-30596"#,
         (r#"%SystemRoot%\System32\shell32.dll"#, 30596),
     );
+    ok_tester(
+        r#"@%SystemRoot%\System32\shell32.dll,30596"#,
+        (r#"%SystemRoot%\System32\shell32.dll"#, 30596),
+    );
     err_tester(r#"This is my application, OK?"#);
     err_tester(r#"%SystemRoot%\System32\imageres.dll,-72"#);
 }
@@ -230,7 +241,7 @@ fn test_expand_string() {
         let expand_final_string = expand_final_string.unwrap();
         let expanded_final_string = expand_final_string.expand();
         assert!(expanded_final_string.is_ok());
-        let expanded_final_string= expanded_final_string.unwrap();
+        let expanded_final_string = expanded_final_string.unwrap();
 
         // Then we expand variable name individually
         let expand_var_name = ExpandString::new(var_name);