RunAsWait() return value

[SPiff59]

The documentation for RunAs() indicates it returns a Process ID.
The documentation for RunAsWait() claims it returns the exit code of the executed command/program. But, the example code for RunAsWait() shows the function return as being a PID.
Which is it?
Does RunAsWait() return a PID, or the "exit code of the program that was run"?

Could the documentation and example code be changed to both reflect what is actually returned by RunAsWait()?
Thanks.