SysFormEnumComboBox sysFormEnumComboBox;
Set enumSet = new Set(Types::Enum); // collection of selected values.
enumSet.add(CustomEnum::Invoice);
enumSet.add(CustomEnum::Purchase);
SysFormEnumComboBox = SysFormEnumComboBox::newParameters(element, element.controlId(formControlStr(CustomForm, ComboBoxCtrl)), enumName2Id(enumStr(CustomEnum)), enumSet,"Type");
super();
SysFormEnumComboBox.select(CustomEnum::Purchase); // To select value in combo