获取安装程序日志文件路径InstallShield

I need to know the InstallShield Log file path which is setup in command line parameters when an install is invoked. I hope there should be some property setup in installsheild which handles the log file path where msi installation logs are to be written. I need to handle that in code, so If I get any kind of property which is set to maintain installation log file path, I can use that property through custom action and can use it in my code..I need to know the InstallShield Log file path