opening a file in an external tool from within netbeans

The netbeans IDE can collect a bunch of files as a project, but sometimes it is necessary to open
a file from the project with an external tool.

How to do this?

The answer is in the NewAndNoteworthyNB81 under C/C++ 10.9.

The C/C++ Plugin brings a sendTo-Utility, which is configurable.

On my linux-box I can configure gedit in the miscellaneous options :

Now you can select some files and select the gedit within the context menu:

Tools->Send To.. -> gedit. 

This context-menu also contains a shortcut to the configuration.