diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 9cf5b8c..542458c 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -2391,7 +2391,11 @@ int hg_scanner::device_io_control(unsigned long code, void* data, unsigned* len)
 
 		return SCANNER_ERR_OK;
 	}
-
+	else if(code == IO_CTRL_CODE_DISPLAY_APP_HELP)
+	{
+		setting_help(data);
+		return SCANNER_ERR_OK;
+	}
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
 }
 std::string hg_scanner::get_firmware_version(void)