The System::PropertySet class represents a single method on an Automation interface that sets the value of a property. The interface is assigned as the value of a Variant. The System::PropertySet object can be executed using the Variant’s Exec method. 

Each System::PropertySet instance is assigned a name, which is the same as the name of the corresponding method on the interface. In addition, it can be assigned parameters that correspond to the parameters of the method. These parameters can be stored by position or by name. 

System::Variant 

System::Function 

System::Procedure