diff --git a/include/core/import_export.h b/include/core/import_export.h
index 954f4a0..e4cc9a4 100644
--- a/include/core/import_export.h
+++ b/include/core/import_export.h
@@ -2,6 +2,7 @@
 #define IMPORT_EXPORT_H
 
 #include "utils/string_ext.h"
+#include "utils/error_code.h"
 
 #define EXPORT_VERSION "1.0"
 
@@ -11,9 +12,9 @@ typedef struct {
 } ExportData;
 
 // 导出 PATH 到文件
-int export_paths_to_file(const ExportData *data, const char *filepath);
+ErrorCode export_paths_to_file(const ExportData *data, const char *filepath);
 
-// 从文件导入 PATH (返回是否包含全部格式)
-int import_paths_from_file(const char *filepath, ExportData *data);
+// 从文件导入 PATH
+ErrorCode import_paths_from_file(const char *filepath, ExportData *data);
 
 #endif // IMPORT_EXPORT_H
\ No newline at end of file
diff --git a/include/core/path_manager.h b/include/core/path_manager.h
index ce3724f..dcdb0e4 100644
--- a/include/core/path_manager.h
+++ b/include/core/path_manager.h
@@ -2,18 +2,18 @@
 #define PATH_MANAGER_H
 
 #include "utils/string_ext.h"
+#include "utils/error_code.h"
 
 // 移除列表中指定索引的项
-void path_manager_remove_at(StringList *list, int index);
+ErrorCode path_manager_remove_at(StringList *list, int index);
 
 // 上移指定索引的项
-void path_manager_move_up(StringList *list, int index);
+ErrorCode path_manager_move_up(StringList *list, int index);
 
 // 下移指定索引的项
-void path_manager_move_down(StringList *list, int index);
+ErrorCode path_manager_move_down(StringList *list, int index);
 
 // 清理无效和重复的路径
-// 返回被清理的项数
-int path_manager_clean(StringList *list);
+ErrorCode path_manager_clean(StringList *list);
 
 #endif // PATH_MANAGER_H
diff --git a/src/controller/callbacks.c b/src/controller/callbacks.c
index e0d2e07..a9bf9e5 100644
--- a/src/controller/callbacks.c
+++ b/src/controller/callbacks.c
@@ -158,7 +158,11 @@ int btn_del_cb(Ihandle *self)
     }
 
     StringList *raw_data = get_current_raw_data(dlg);
-    path_manager_remove_at(raw_data, selected - 1);
+    ErrorCode result = path_manager_remove_at(raw_data, selected - 1);
+    if (result != ERR_OK)
+    {
+        log_error("Failed to remove path at index %d", selected - 1);
+    }
 
     sync_string_list_to_ui(current_list, raw_data);
 
@@ -179,7 +183,11 @@ int btn_up_cb(Ihandle *self)
         return IUP_DEFAULT;
 
     StringList *raw_data = get_current_raw_data(dlg);
-    path_manager_move_up(raw_data, selected - 1);
+    ErrorCode result = path_manager_move_up(raw_data, selected - 1);
+    if (result != ERR_OK)
+    {
+        log_error("Failed to move path up at index %d", selected - 1);
+    }
 
     sync_string_list_to_ui(current_list, raw_data);
     IupSetInt(current_list, "VALUE", selected - 1);
@@ -198,7 +206,11 @@ int btn_down_cb(Ihandle *self)
     if (selected == 0 || selected >= raw_data->count)
         return IUP_DEFAULT;
 
-    path_manager_move_down(raw_data, selected - 1);
+    ErrorCode result = path_manager_move_down(raw_data, selected - 1);
+    if (result != ERR_OK)
+    {
+        log_error("Failed to move path down at index %d", selected - 1);
+    }
 
     sync_string_list_to_ui(current_list, raw_data);
     IupSetInt(current_list, "VALUE", selected + 1);
@@ -219,7 +231,9 @@ int btn_clean_cb(Ihandle *self)
         return IUP_DEFAULT;
     }
 
-    int removed = path_manager_clean(raw_data);
+    int before_count = raw_data->count;
+    path_manager_clean(raw_data);
+    int removed = before_count - raw_data->count;
 
     Ihandle *current_list = get_current_list(dlg);
     sync_string_list_to_ui(current_list, raw_data);
@@ -391,7 +405,8 @@ int btn_import_cb(Ihandle *self)
         if (filepath)
         {
             ExportData imported;
-            if (import_paths_from_file(filepath, &imported) == 0)
+            ErrorCode import_result = import_paths_from_file(filepath, &imported);
+            if (import_result == ERR_OK)
             {
                 int has_system = imported.system.count > 0;
                 int has_user = imported.user.count > 0;
@@ -453,6 +468,7 @@ int btn_import_cb(Ihandle *self)
             }
             else
             {
+                log_error("Import failed: error code %d", import_result);
                 IupMessage("错误", "导入失败，请检查文件格式是否正确！");
             }
         }
@@ -502,7 +518,8 @@ int btn_export_cb(Ihandle *self)
             }
             filepath = final_path;
 
-            if (export_paths_to_file(&data, filepath) == 0)
+            ErrorCode export_result = export_paths_to_file(&data, filepath);
+            if (export_result == ERR_OK)
             {
                 char msg[512];
                 snprintf(msg, sizeof(msg), "成功导出！\n系统变量: %d 个\n用户变量: %d 个\n\n保存位置: %s",
@@ -511,6 +528,7 @@ int btn_export_cb(Ihandle *self)
             }
             else
             {
+                log_error("Export failed: error code %d", export_result);
                 IupMessage("错误", "导出失败！");
             }
         }
diff --git a/src/core/import_export.c b/src/core/import_export.c
index 3712a1f..7770b21 100644
--- a/src/core/import_export.c
+++ b/src/core/import_export.c
@@ -1,5 +1,7 @@
 #include "core/import_export.h"
 #include "utils/os_env.h"
+#include "utils/error_code.h"
+#include "utils/logger.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -59,14 +61,17 @@ static char *escape_json_string(const char *str)
 }
 
 // 导出路径数据到 JSON 文件
-int export_paths_to_file(const ExportData *data, const char *filepath)
+ErrorCode export_paths_to_file(const ExportData *data, const char *filepath)
 {
     if (!data || !filepath)
-        return -1;
+        return ERR_NULL_PTR;
 
     FILE *fp = fopen(filepath, "w");
     if (!fp)
-        return -1;
+    {
+        log_error("Failed to open file for export: %s", filepath);
+        return ERR_FILE_NOT_FOUND;
+    }
 
     fprintf(fp, "\xEF\xBB\xBF");
 
@@ -111,7 +116,9 @@ int export_paths_to_file(const ExportData *data, const char *filepath)
     fprintf(fp, "}\n");
 
     fclose(fp);
-    return 0;
+    log_info("Exported paths to file: sys=%d, user=%d, file=%s",
+             data->system.count, data->user.count, filepath);
+    return ERR_OK;
 }
 
 // 移除字符串首尾的空格、制表符、换行符和回车符
@@ -148,11 +155,11 @@ static int is_json_file(const char *filepath)
     return ext && strcasecmp(ext, ".json") == 0;
 }
 
-// 从文件导入 PATH (返回是否包含全部格式)
-int import_paths_from_file(const char *filepath, ExportData *data)
+// 从文件导入 PATH
+ErrorCode import_paths_from_file(const char *filepath, ExportData *data)
 {
     if (!filepath || !data)
-        return -1;
+        return ERR_NULL_PTR;
 
     init_string_list(&data->system);
     init_string_list(&data->user);
@@ -161,7 +168,10 @@ int import_paths_from_file(const char *filepath, ExportData *data)
     {
         FILE *fp = fopen(filepath, "rb");
         if (!fp)
-            return -1;
+        {
+            log_error("Failed to open file for import: %s", filepath);
+            return ERR_FILE_NOT_FOUND;
+        }
 
         StringList list;
         init_string_list(&list);
@@ -178,12 +188,16 @@ int import_paths_from_file(const char *filepath, ExportData *data)
         fclose(fp);
 
         data->system = list;
-        return 0;
+        log_info("Imported paths from TXT file: %d paths, file=%s", list.count, filepath);
+        return ERR_OK;
     }
 
     FILE *fp = fopen(filepath, "rb");
     if (!fp)
-        return -1;
+    {
+        log_error("Failed to open file for import: %s", filepath);
+        return ERR_FILE_NOT_FOUND;
+    }
 
     char buffer[8192];
     int in_system = 0;
@@ -292,5 +306,7 @@ int import_paths_from_file(const char *filepath, ExportData *data)
     }
 
     fclose(fp);
-    return 0;
+    log_info("Imported paths from JSON file: sys=%d, user=%d, file=%s",
+             data->system.count, data->user.count, filepath);
+    return ERR_OK;
 }
\ No newline at end of file
diff --git a/src/core/path_manager.c b/src/core/path_manager.c
index 2cc9d40..abaddd3 100644
--- a/src/core/path_manager.c
+++ b/src/core/path_manager.c
@@ -1,51 +1,57 @@
 #include "core/path_manager.h"
 #include "utils/os_env.h"
+#include "utils/error_code.h"
+#include "utils/logger.h"
 #include <stdlib.h>
 #include <string.h>
 
 // 删除指定索引的路径项
-void path_manager_remove_at(StringList *list, int index)
+ErrorCode path_manager_remove_at(StringList *list, int index)
 {
     if (!list || index < 0 || index >= list->count)
-        return;
+        return ERR_NULL_PTR;
     
     free(list->items[index]);
     for (int i = index; i < list->count - 1; i++)
     {
         list->items[i] = list->items[i + 1];
     }
+    list->items[list->count - 1] = NULL;
     list->count--;
+    return ERR_OK;
 }
 
 // 向上移动路径项
-void path_manager_move_up(StringList *list, int index)
+ErrorCode path_manager_move_up(StringList *list, int index)
 {
     if (!list || index <= 0 || index >= list->count)
-        return;
+        return ERR_NULL_PTR;
     
     char *temp = list->items[index];
     list->items[index] = list->items[index - 1];
     list->items[index - 1] = temp;
+    return ERR_OK;
 }
 
 // 向下移动路径项
-void path_manager_move_down(StringList *list, int index)
+ErrorCode path_manager_move_down(StringList *list, int index)
 {
     if (!list || index < 0 || index >= list->count - 1)
-        return;
+        return ERR_NULL_PTR;
     
     char *temp = list->items[index];
     list->items[index] = list->items[index + 1];
     list->items[index + 1] = temp;
+    return ERR_OK;
 }
 
 // 清理无效路径项
-int path_manager_clean(StringList *list)
+ErrorCode path_manager_clean(StringList *list)
 {
-    if (!list) return 0;
+    if (!list) return ERR_NULL_PTR;
+    
     int removed_count = 0;
 
-    // 从后往前遍历，方便删除
     for (int i = list->count - 1; i >= 0; i--)
     {
         char *item = list->items[i];
@@ -53,14 +59,12 @@ int path_manager_clean(StringList *list)
 
         int should_remove = 0;
 
-        // 1. 检查有效性
         if (!is_path_valid(item))
         {
             should_remove = 1;
         }
         else
         {
-            // 2. 检查重复 (检查当前项之前是否出现过)
             for (int j = 0; j < i; j++)
             {
                 char *prev_item = list->items[j];
@@ -78,5 +82,8 @@ int path_manager_clean(StringList *list)
             removed_count++;
         }
     }
-    return removed_count;
+    
+    log_info("Cleaned paths: removed %d invalid/duplicate paths, remaining %d", 
+            removed_count, list->count);
+    return ERR_OK;
 }
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 510d106..65a635e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -18,7 +18,7 @@ cmake --build build
 !打包命令：
 build_installer.bat
 !运行命令：
-build\\PathEditor.exe
+powershell -Command "Start-Process 'build\\PathEditor.exe' -Verb RunAs"
 */
 
 // 定义 Windows 消息常量