I don't remember if the ability to read/write to the registry was already integrated in the programmer's toolbox in CVI 5.5, but it can be verified loading this instrument ( <cvidir>\toolbox\toolbox.fp ) and looking for a Registry... section in the function list.
If it's not, you can read the registry by using SDK functions RegOpenKeyEx and RegQueryValueEx: understanding SDK documentation is not a trivial task but not impossible, especially if your needs are limited to read a few elements only from the registry.
