Installscript项目如何挂钩到安装过程中

I have created an installscript project using InstallShield 2010. I gather info during the install process in the method "OnFirstUIBefore()". But when the actual install of the software is happening (i.e. when you see a progress bar and it is copying over installation files) I would like to do some actions based on the user input.I have created an installscript project using I