notepad++ user defined regions with folding

I can't figure out how to configure notepad++ to display regions for user defined keywords.

I have a big trace file which shows the start and the end of a procedure. The trace file looks like this:

Beginn abc.def;
   ...
   Beginn ghi.jkl;
   ...
   Ende ghi.jkl;
   ...
Ende abc.def;

I would like to fold those regions like this:

[+] Beginn abc.def;

or

[-] Beginn abc.def;
       ...
[+]    Beginn ghi.jkl;
       ...
    Ende abc.def;

How do I configure my notepad++ to display this. Is it possible? Do you have any other suggestions?