# StartOptions

> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.


**StartOptions** is the basic communication component of the system.


## Modules to Import

  
```
import StartOptions from '@ohos.application.StartOptions';
```

## Attributes

**System capability**: SystemCapability.Ability.AbilityRuntime.AbilityCore

| Name| Readable| Writable| Type| Mandatory| Description| 
| -------- | -------- | -------- | -------- | -------- | -------- |
| windowMode | Yes| No| number | No| Window mode.| 
| displayId | Yes| No| number | No| Display ID.|