wix - How to show erros occuring during installation of prerequesites -
using wix 3.10 when installing .net 4.6 on windows 8.0, microsoft package returns error since computer missing anothger kb microsoft. that's ok far, want show message net-installer in custom wpf-ui, didn't figured out event trigger. in viewmodel have current instance of bootstrapperapplication , first approach not log anything: internal mainviewmodel(bootstrapperapplication model, action<loglevel, string> onloggeraction, (....)) { this.model = model; this.model.detectpackagecomplete += this.detectpackagecomplete; this.model.detectrelatedbundle += new eventhandler<detectrelatedbundleeventargs>(this.model_detectrelatedbundle); this.model.detectpriorbundle += new eventhandler<detectpriorbundleeventargs>(this.model_detectpriorbundle); this.model.detectrelatedmsipackage += new eventhandler<detectrelatedmsipackageeventargs>(this.model_detectrelatedmsipackage); this.model.detecttargetmsipackage += new eventhandler<detecttargetmsipackag...