Hi Steven,
I think the only way is to manually close the execution window in TestStand 1.0.x.
In TestStand 2.0 they is additional ExecutionMasks you can use, use 'ExecTypeMask_CloseWindowWhenDone' for the executionTypeMaskParam parameter of Engine.NewExecution( sequenceFileParam, sequenceName, processModelParam, breakAtFirstStep, executionTypeMaskParam [, sequenceArgsParam] [, editArgsParam] [, InteractiveArgsParam])
Hope this helps
Ray Farmer
Regards
Ray Farmer