diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index ca926c0..ab2c54f 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -922,6 +922,8 @@ int hg_scanner::setting_help(void* data)
 	printf("helpfile = %s\r\n",helpfile.c_str());
 
 #ifdef WIN32
+	com = "";
+	helpfile.insert(0, g_module_path);
 	FILE* src = fopen(helpfile.c_str(), "rb");
 	if (src)
 		fclose(src);
diff --git a/hgdriver/hgdev/hg_scanner.h b/hgdriver/hgdev/hg_scanner.h
index 73bb09e..d6ee98e 100644
--- a/hgdriver/hgdev/hg_scanner.h
+++ b/hgdriver/hgdev/hg_scanner.h
@@ -22,6 +22,7 @@
 #include "PaperSize.h"
 
 #ifdef WIN32
+extern std::string g_module_path;  // Ending with '\\'
 #else
 #include <unistd.h>
 #endif
@@ -373,6 +374,6 @@ public:
     #else
     static const std::string helpfile_ ="/opt/apps/scanner-driver-huagao/doc/HuaGoScan_scanSettings_Help_manual.pdf";//帮助文档路径
     #endif
-#else
-    static const std::string helpfile_ ="";
+#elif defined(WIN32)
+    static const std::string helpfile_ = "docs\\help_setting.pdf";
 #endif
\ No newline at end of file
diff --git a/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp b/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
index c4df4f6..b36b3a0 100644
--- a/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
+++ b/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
@@ -98,4 +98,29 @@ extern "C"
 	{
 		return hg_scanner_mgr::instance()->hg_scanner_control(h, code, data, len);
 	}
-}
\ No newline at end of file
+}
+
+
+#ifdef WIN32
+std::string g_module_path = "";
+
+BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID reserved)
+{
+	if (reason == DLL_PROCESS_ATTACH)
+	{
+		if (g_module_path.empty())
+		{
+			char	path[MAX_PATH] = { 0 };
+
+			GetModuleFileNameA(inst, path, _countof(path) - 1);
+			if (strrchr(path, '\\'))
+			{
+				strrchr(path, '\\')[1] = 0;
+				g_module_path = path;
+			}
+		}
+	}
+
+	return TRUE;
+}
+#endif
diff --git a/hgsane/sane_hg_mdw.cpp b/hgsane/sane_hg_mdw.cpp
index aff1691..960d4f8 100644
--- a/hgsane/sane_hg_mdw.cpp
+++ b/hgsane/sane_hg_mdw.cpp
@@ -2696,3 +2696,26 @@ extern "C" {	// avoid compiler exporting name in C++ style !!!
 }
 
 
+#ifdef WIN32
+std::string g_module_path = "";
+
+BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID reserved)
+{
+	if (reason == DLL_PROCESS_ATTACH)
+	{
+		if (g_module_path.empty())
+		{
+			char	path[MAX_PATH] = { 0 };
+
+			GetModuleFileNameA(inst, path, _countof(path) - 1);
+			if (strrchr(path, '\\'))
+			{
+				strrchr(path, '\\')[1] = 0;
+				g_module_path = path;
+			}
+		}
+	}
+
+	return TRUE;
+}
+#endif
diff --git a/hgsane/sane_option.h b/hgsane/sane_option.h
index aa825ac..8572db9 100644
--- a/hgsane/sane_option.h
+++ b/hgsane/sane_option.h
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #ifdef WIN32
 #define bzero(b, s)		memset(b, 0, s)
+extern std::string g_module_path;	// Ending with '\\'
 #else
 #include <iconv.h>
 #endif