Has Buttons| Friendly Name | Has Buttons |
|---|---|
| API Name | HasButtons |
| Type | Boolean |
| Restrictions | |
| Get Function | (dcl-Control-GetHasButtons
<CONTROL>) |
| Set Function | (dcl-Control-SetHasButtons
<CONTROL>
NewValue [as Boolean]) |
| Applies To | Tree |
如果设置此属性，则控件将对每个包含子项的父项目显示一个展开/未展开按钮。