File Must Exist| Friendly Name | File Must Exist |
|---|---|
| API Name | FileMustExist |
| Type | Boolean |
| Restrictions | |
| Get Function | (dcl-Control-GetFileMustExist
<CONTROL>) |
| Set Function | (dcl-Control-SetFileMustExist
<CONTROL>
NewValue [as Boolean]) |
| Applies To | File Explorer |
如果设置此属性，则强制用户选择现有文件名。