Registers a delegate of type ProgressHandlerDelegate as the progress handler.
Any previously set handler is released. Pass null to disable the callback.
The approximate number of virtual machine instructions that are evaluated between successive invocations of the handler.
A delegate that should return 0 if the operation can continue or another value if it must be aborted.
http://www.sqlite.org/c3ref/progress_handler.html.
See Implementation
Registers a delegate of type ProgressHandlerDelegate as the progress handler.
Any previously set handler is released. Pass null to disable the callback.