* [Setup] directive AppMutex and support function CheckForMutexes change: to specify a mutex name containing a comma you can now escape the comma with a backslash. * Minor tweaks.
Replaced constant {regasmexe} with {dotnet11} and {dotnet20}. Pascal Scripting: Added new PrepareToInstall event function. Return a non empty string from this function to instruct Setup to stop at the Preparing to Install wizard page showing the returned string as the error message. Minor fixes and tweaks.
