ComboBox filter

1. Add Enum control in Form

2 .Enum Contol AutoDeclaration property set to Yes. 

3 .in control modified method add below code.

public boolean modified()

{

     int                                ret;

    QueryBuildRange       range;

    ;

    ret = super();

    range = SysQuery::findOrCreateRange(
        purchTable_DS.query().dataSourceTable(tablenum(PurchTable)),
        fieldnum(PurchTable, PurchStatus));
    range.value(queryValue(controlname.selection()));
    purchTable_DS.executeQuery();

    return ret;

}