1# WMS<a name="EN-US_TOPIC_0000001122925147"></a>
2
3-   [Introduction](#section11660541593)
4-   [Directory Structure](#section161941989596)
5-   [Compilation and Building](#section137768191623)
6-   [Description](#section1312121216216)
7    -   [Usage](#section129654513264)
8
9-   [Repositories Involved](#section1371113476307)
10
11## Introduction<a name="section11660541593"></a>
12
13The graphics service uses the client/server \(C/S\) architecture and is divided into two sub-services: Window Manager Service \(WMS\) and Input Manager Service \(IMS\). The application calls the APIs provided by the client to obtain the window status and process events. The server interacts with the hardware to implement display and input event distribution.
14
15-   WMS: Manages and combines windows of different applications in a unified manner. Each window is bound to a  **RootView**  object.
16-   IMS: Connects to the underlying input event driver framework to monitor and distribute input events.
17
18**Figure  1** <a name="fig163546295165"></a>
19
20
21![](figures/en-us_image_0000001127903103.png)
22
23## Directory Structure<a name="section161941989596"></a>
24
25```
26/foundation/window/window_manager_lite
27├── frameworks      # Client
28│   ├── ims         # Input event management service client
29│   └── wms         # Window management service client
30├── interfaces      # APIs
31│   ├── innerkits   # APIs between modules
32├── services        # Server
33│   ├── ims         # Input event management service
34│   └── wms         # Window management service
35└── test            # Test code
36```
37
38## Compilation and Building<a name="section137768191623"></a>
39
40```
41# Generate the wms_server and libwms_client.so files in the out directory of the product folder through GN compilation.
42hb build window_manager_lite
43```
44
45## Description<a name="section1312121216216"></a>
46
47### Usage<a name="section129654513264"></a>
48
49-   WMS provides methods to display various UI components, send event notifications, and process various events. For details, see the related source code.
50-   **test/sample\_window**  provides the unit testing for each WMS API. Refer to it for the usage of WMS.
51
52## Repositories Involved<a name="section1371113476307"></a>
53
54[Graphic subsystem](https://gitee.com/openharmony/docs/blob/master/en/readme/graphics.md)
55
56**window_manager_lite**
57
58[graphic_surface_lite](https://gitee.com/openharmony/graphic_surface_lite/blob/master/README.md)
59
60[arkui_ui_lite](https://gitee.com/openharmony/arkui_ui_lite/blob/master/README.md)
61
62[graphic_graphic_utils_lite](https://gitee.com/openharmony/graphic_graphic_utils_lite/blob/master/README.md)