| BEGIN_PROPERTY | Begins the implementation of a property. |
| END_PROPERTY | Ends the implementation of a property. |
| PLENGTH | Returns the length of the string value the property must be set to. |
| PROP | Returns a pointer to the value the property must be set to. |
| PSTRING | Returns the address of the string value the property must be set to. |
| READ_PROPERTY | Returns if the property implementation was called for reading. |
| VPROP | Returns the value the property must be set to. |