executiong speed fo different operating systems

I run my tests on different windows operating systems. On some of them, the tests run too fast for my application to respond. I want to slow them down on those operating systems but allow them to run more quickly on others. I want to do this DYNAMICALLY. I thought it would be cool to set the Delay Between Events project property in script. But that property does not seem to be writable run time.



I know I can read the operating system somehow. I can look in help for that. But how can I dynamically slow the execution down?



Thanks



S