Reading registry Binary and

Is there anyway to read a registry binary value as I can only find ReadRegDWORD and ReadRegStr. Also, can you get the currently loged-on username and computername using ReadEnvStr or any other method, and is there somewhere I can get a list of other environment strings?
Thanks

You can't read binary data from the registry using NSIS because NSIS can only handle the string data type. You can always write an extension DLL (plug-in) to do this. You can find an example in Contrib\ExDLL.

To get the user name under NT (NT, 2000, or XP) use the UserInfo DLL. To get a list of environment variables use nsExec to execute the command set:

ReadEnvStr $0 "COMSPEC"
nsExec::ExecToLog "$0 /C set"
# or...
nsExec::ExecToStack "$0 /C set" 

I am not sure it will fit to a NSIS variable, so you can also direct it into a temporary file and read it from there (using "$0 /C set > $TEMP\file.txt" for example).

%COMPUTERNAME% holds the name of the computer but I am not sure it is available on Windows 9x too... You will have to check that.

Thanks for that.
I meant to ask in the original post if anyone knew how to get the date/time: anyone know?

NSISdt by Robert Rainwater should help you there: