unidac, oracle, direct mode, disconnected mode, non blocking - cancel query

unidac, oracle, direct mode, disconnected mode, non blocking - cancel query

Hi,
i am using unidac to connect to oracle in direct mode, disconnected mode, non blocking and i have sometimes SELECT queries which are last long. I want to cancel them.
The query will be triggered from the main/ui thread.
How to do this? Do you have an example?

thanks