Change current working directory to that specified by argument.
| Number | Type | Compulsory | Default | Description | 
| 1 | string | Yes | New directory | 
Return type: real
| Code | Meaning | 
| 0 | Success | 
| 1 | Cannot create directory | 
| 2 | Invalid disk (windows) | 
| ▲Function Summary▲ | ||
| ◄ CanOpenFile | Char ▶ | |