Property of VI.
Returns the name of the LabVIEW project library, XControl, or LabVIEW class that owns the VI. If no library, XControl, or class owns the VI, the property returns Not a Refnum.
The following table lists the characteristics of this property.
| Available in Run-Time Engine and Real-Time Operating System | No |
| Permissions | Read Only |
| Settable when the VI is running | No |
| Loads the front panel into memory | No |
| Need to authenticate before use | No |
| Loads the block diagram into memory | No |
| Remote access disallowed | No |
| Must wait until user interface is idle | No |
| Available with control VIs | Yes |
| Available with global VIs | Yes |
| Available with strict type definitions | Yes |
| Available with polymorphic VIs | Yes |