This example tutorial will guide you to add new default dim on table and forms.

1. Add new field with type Int64 and set the properties.

2. Add relation on table relation and set the properties.

3. on class declaration form , add code below :

public class FormRun extends ObjectRun
{
    DimensionDefaultingController   dimensionDefaultingController;
}

4. add tab page Financial Dimension on form design , and set properties like img below

5. on TabFinancialDimensions , override method pageActivated

public void pageActivated()
{
    dimensionDefaultingController.pageActivated();

    super();
}

6. on init form, like code below :

public void init()
{
    super();
    dimensionDefaultingController = DimensionDefaultingController::constructInTabWithValues(true, true, true, 0, this, TabFinancialDimensions, "@SYS138487", curext());
    dimensionDefaultingController.parmAttributeValueSetDataSource(HRSJobPowerPlan_ds, fieldStr(HRSJobPowerPlan, DefaultDimension));
}

7. finnaly, on datasource form method override method :
on active()

public int active()
{
    int ret;

    ret = super();
    dimensionDefaultingController.activated();

    return ret;
}

on write()

public void write()
{
    dimensionDefaultingController.writing();
    super();
}

on delete()

public void delete()
{
    dimensionDefaultingController.deleted();
    super();
}

8. preview example form: