I have never built a custom task before. I've been working from
examples and the general structure seems easy enough. I have run into
a question that I can't find much reference to anywhere.

I am trying to create a task with the same basic structure as the
Queries section of the Data Driven Query Task Properties. For each
query type you can have a query and then multiple destinations and
corresponding parameter to go with it.

I can get a single query type with one description but I don't know how
to have an array of queries with an array of values for each value
within the first array. This is probably simple but I can't find an
example anywhere to work from and I can't find any books that go beyond
the simple stuff. Can anybody give a basic outline of what I need to
do?