The PR_NULL property represents a null value or setting of a property or reserves array space.
| Header file: | MAPITAGS.H |
| Identifier: | 0x0000 |
| Property type: | PT_NULL |
| Property tag: | 0x00000001 |
The PR_NULL property is used to reserve space in arrays of SPropValue structures. It is used in an array of SPropTag structures to tell the method to reserve space in the returned array of SPropValue structures. This allows for computed properties to be filled in an inexpensive way.
For more information, see About Property Types.