diff --git a/.gitignore b/.gitignore
index 752ce6b..2741ae6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /cmake-build-debug/
 /.idea/*
-/.idea/
\ No newline at end of file
+/.idea/
+/src/ShimLib/ShimLib.c
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f014230..1929ae4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,7 @@ file(GLOB_RECURSE project_headers ./src/*.h)
 file(GLOB_RECURSE  project_cpps ./src/*.cpp)
 file(GLOB_RECURSE  project_cxx ./src/*.cxx)
 file(GLOB_RECURSE  project_cc ./src/*.cc)
+file(GLOB_RECURSE  project_c ./src/*.c)
 include_directories(./src/)
 
 find_package(Qt5 COMPONENTS Core Widgets Gui OpenGL Sql REQUIRED)
@@ -16,7 +17,7 @@ set(CMAKE_AUTORCC ON)
 file(GLOB  project_uis ./src/*.ui)
 qt5_wrap_ui(ui_FILES ${project_uis})
 file(GLOB  project_res ./src/*.qrc)
-add_executable(${PROJECT_NAME} ${project_headers} ${project_cpps} ${project_cxx} ${project_res} ${project_cc} ${ui_FILES})
+add_executable(${PROJECT_NAME} ${project_headers} ${project_cpps} ${project_cxx} ${project_res} ${project_cc} ${project_c} ${ui_FILES})
 target_link_libraries(${PROJECT_NAME} Qt5::Core Qt5::Widgets Qt5::Gui Qt5::OpenGL Qt5::Sql)
 
 if(MSVC) 
diff --git a/src/ShimLib/ShimLib.h b/src/ShimLib/ShimLib.h
new file mode 100644
index 0000000..6c54e2d
--- /dev/null
+++ b/src/ShimLib/ShimLib.h
@@ -0,0 +1,56 @@
+//
+// Created by Krad on 2021/10/12.
+//
+
+#ifndef GUI_SHIMLIB_H
+#define GUI_SHIMLIB_H
+#ifdef __CPLUSPLUS
+extern "C"{
+#endif
+typedef enum
+{
+    BUSY,// device is preparing for scan
+    READY,// device is ready for scan
+    SCANING,// device is doing scan
+    ERROR// some device inner error are occured
+}DeviceStatus;
+
+typedef struct StatusInfo
+{
+    DeviceStatus status;// a enum represent device current status
+    float progress;// percent value of operation
+}StatusInfo;
+
+
+
+//3 kinds of scan action
+typedef enum
+{
+    SCAN,// Start scan action
+    PREVIEW_SCAN,// Start preview scan action
+    STOP,// Stop current scan
+}ScanAction;
+
+//kinds of device information
+typedef enum
+{
+    MEAN_TEMPERATURE
+}DeviceInfo;
+
+int InitLib(void(*)(const char * msg));
+
+int ScanControl(ScanAction actionType);
+
+StatusInfo GetStatus();
+
+int SetScanInf(const char * jsonString);
+
+const char * GetPreviewData();
+
+const char * GetDeviceInf(DeviceInfo infoType);
+
+#ifdef __CPLUSPLUS
+}
+#endif
+
+#endif //GUI_SHIMLIB_H