As "shell32.dll" and "kernel32.dll" are available in every Windows- System (32Bit and 64Bit), this will work for every Windows system.
And for the same reason, this code will not work for any AIX / Linux / other OS, as they do not know the dlls...
If you just want to execute something and NOT have to wait for its completion, then using the built in LotusScript "shell"- function is absolutely sufficient.
Unfortunately I have no example code for any other way of doing this in NON Windows OS