| 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. |