| TAnyProc | Callback handler to clear variants of type Any | 
| TBooleanToStringRule | Enumeration describing how to convert boolean values to string values. | 
| TCustomVariantTypeClass | Class of TCustomVariantType | 
| TNullCompareRule | Enumeration describing how to handle Null values when comparing variants. | 
| TVarCompareResult | Compare 2 variant values | 
| TVarDataArray | Dynamic array of vardata records. | 
| TVarDispProc | Callback to perform dispatch call on variant | 
| TVariantRelationship | Enumerated type to describe comparison operations between variants |