It is a library that allows us to encrypt data, even if you find it unnecessary, it is used by other libraries and components that are likely to use it when it comes to encrypting data, so I recommend installing it.
Go in ->Online Package Manager(GPO or OPM in English), then search for “DCPcrypt” and mark the entire tree:
and click Install|Install from repository. Sometimes you will be asked to restart the IDE, answer “yes” and proceed. Repeat the same operation for all the indicated components.
If you are looking for more examples, please read this other article titled “learning by example“, in it you will find many examples.