The easiest way to work with charts and crosstabs is to insert them into the report container. See chapter Printing Relational Data for a detailed explanation.
However, for label and card projects it might be interesting to access these objects separately.
In the following chapter whenever "chart" is mentioned "crosstab" also applies.
Besides working with the report container, there are two different modes when handling chart objects. Choose the one you require via the option LL_OPTION_USECHARTFIELDS. In principle, printing charts is similar to printing tables, i.e. you first declare a data record you wish to pass to the chart object and pass this record afterwards.