diff --git a/lib/core/Handles/HandlesExprAttr.py b/lib/core/Handles/HandlesExprAttr.py
index 3407c93..426184d 100644
--- a/lib/core/Handles/HandlesExprAttr.py
+++ b/lib/core/Handles/HandlesExprAttr.py
@@ -425,6 +425,18 @@ class ExprAttrHandle(BaseHandle):
         for key in (f"{VarName}.{AttrName}", AttrName):
             if key in define_constants:
                 return self._make_define_constant(Gen, define_constants[key])
+        # 回退：_all_define_constants（Phase2Translator 从所有 .pyi 预提取的跨模块 CDefine，
+        # 与 _HandleNameLlvm 的裸名回退同源）。**模块属性访问**（`win32file.STD_OUTPUT_HANDLE`）
+        # 此前只查 SymbolTable/_define_constants → 未命中就落到 _lookup_module_global 生成
+        # `@STD_OUTPUT_HANDLE` 全局引用（无定义 → 链接期 undefined symbol）。
+        # 与裸名路径同口径：仅当本模块没有同名变量/全局时才用常量（避免遮蔽真正的模块全局）。
+        _has_shadow: bool = AttrName in Gen.variables \
+            or (hasattr(Gen, 'module') and AttrName in getattr(Gen.module, 'globals', {}))
+        if not _has_shadow:
+            all_dc: dict[str, Any] = getattr(Gen, '_all_define_constants', None) or getattr(self.Trans, '_all_define_constants', None) or {}
+            for key2 in (f"{VarName}.{AttrName}", AttrName):
+                if key2 in all_dc:
+                    return self._make_define_constant(Gen, all_dc[key2])
         return None
 
     def _NormalizeModuleGlobalValue(self, Gen: LlvmCodeGenerator, Val: Any, AttrName: str) -> Any: