FIX: StillExecuting Is True After Async Execution Completes

RESOLUTION

While the StillExecuting property of the Connection and QueryDef objects will incorrectly return a True the first time it is read after the asynchronous operation has completed, further tests of the StillExecuting property will return a False. Testing the StillExecuting property inside of a While loop will work. After the operation has completed, the While loop will run through one more cycle where StillExecuting will return a True, after which it will correctly return a False.