Region :: setProperty - Set region property

The function sets the data source for the region to the property handle passed in cProperty.. When the region contains sub-regions or columns, data sources for all sub-ordinates regions and columns may change as well.

In order to handle context managed data sources properly, the data source definition for the region should define the data source as user-defined.

When the region is not valid, the function throws an exception. When the property handle is not valid (empty), the data source for the region will be reset.