# native_handwrite_api.h

> phone 6.0.0(20)+ | 2in1 6.0.0(20)+ | tablet 6.0.0(20)+

## 概述

声明用于对外提供手写能力。

**库：** libhandwrite_ndk.z.so

**引用文件：** <handwrite/native_handwrite_api.h>

**系统能力：** SystemCapability.Stylus.Handwrite

**起始版本：** 6.0.0(20)

**相关模块：** [HandWrite](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-c)

## 汇总

### 结构体

|名称|描述|
|:-----------------------------------------------------------------------------------------------------------------------------------------|:-------------|
|struct [HandWrite_HistoricalPoint](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-struct-historicalpoint)|定义历史触摸点信息的结构体。|

### 枚举

|名称|描述|
|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-------|
|[Handwrite_ErrCode](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-c#handwrite_errcode) { E_NO_ERROR = 0, E_PARAMS = 401, E_INNER_ERROR = 1010400001, E_PERMISSION = 201 }|定义手写错误码。|

### 函数

|名称|函数|
|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----------|
|int32_t [HMS_HandWrite_GetPredictPoint](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-c#hms_handwrite_getpredictpoint)(const [HandWrite_HistoricalPoint](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-struct-historicalpoint) *event, int32_t size, float *predictPointX, float *predictPointY)|此接口用于获取预测点。|

### 函数

|名称|函数|
|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-------------------|
|int32_t [HMS_HandWrite_SetRefreshDelayOff](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/pen-handwrite-c#hms_handwrite_setrefreshdelayoff)(const char* xcomponentId, const bool enable)|此接口用于笔记类应用提升手写笔书写时延。|