Use System::Variant::Exec to call Automation methods.  

The cmd parameter is the wrapper class for the method on an interface that is assigned as the System::Variant::Variant's value. Use this parameter to identify the method you want to call and to assign any parameter values. 

The lcid parameter is ignored by System::Variant::Variant. The locale identifier used to interpret parameters is always LOCALE_SYSTEM_DEFAULT. 

System::Variant::OleFunction 

System::Variant::OleProcedure 

System::Variant::OlePropertyGet 

System::Variant::OlePropertySet