// So we need to ensure that we do not change the IsModified property with whatever we do
Object aModifiedFlag = xFormProps.getPropertyValue( "IsModified" );
// get the columns of our master form
XColumnsSupplier xSuppCols = (XColumnsSupplier)UnoRuntime.queryInterface(
XColumnsSupplier.class, xFormProps );
XNameAccess xCols = xSuppCols.getColumns();
// and update the date column with a NULL value
XColumnUpdate xDateColumn = (XColumnUpdate)UnoRuntime.queryInterface(
XColumnUpdate.class, xCols.getByName( "SALEDATE" ) );
xDateColumn.updateNull();