possible setup.exe exit codes?

As part of our application deployment we have wrapped and automated the SQL Server Express install by launching the setup.exe with our parameters and waiting around for the process to exit.

I had been checking for a Exit Code != 0 to detect errors returned by setup.exe but this does not appear to be foolproof. Several customers' deployments have returned non-zero exit codes, but SQL Express seems to be successfully installed.

I have not found a reference of possible codes returned and their meaning that I could use to fine tune our checking. Does one exist? Or am I going about this the wrong way and should just check for the existence of our instance after setup is complete?

thank you for any input.

I *think* the only other success error code you need to code around is error code 3010, which signifies success, but a reboot is necessary.

Here is a list of other possible Windows Installer error codes:

http://msdn2.microsoft.com/en-us/library/aa368542.aspx

Thanks,
Sam Lester (MSFT)