In reply to TomTom.

It's already implemented. The SAS Enhanced editor has a number of keyboard shortcuts built in, and CTRL+/ and CTRL+SHIFT+/ are just two of them.

To see all the pre-defined keyboard shortcuts, bring up the SAS Windowing Environment (formerly known as SAS Display Manager). Select Tools-->Keyboard Macros-->Macros. Click Assign Keys. This brings up the Assign Keys dialog box.

If you choose "Selection Operations" from the Categories menu, you will see the comment/uncomment commands, and the keys that they are currently mapped to. If you choose "All" from the Categories menu, you can se all options and key bindings.

This is all pretty well hidden, don't you think?