How to Pass on Dimension Filter Selected values to another Component

Hello Experts,

Suppose we've a Dimension Filter, how can we achieve following things:

a) When the user selects multiple items from a DimensionFilter(DS1), then we'll use that to filter a Crosstab (DS4). The basic question here is how can we know which all values was selected from that DimensionFilter box.

Thanks & regards,

Jomy