Codeblocks comment out whole block

A quick google gives me this page, which says it's Ctrl + Shift + C.

Ctrl + Shift + C to comment selected block

Ctrl + Shift + X to uncomment .

You can do a box comment with /* at the start and */ at the end. It'll block out everything in between.

i.e.

/*This is part of a block comment. 

This is still part of it

This also part of it */

If you just highlight the code you want to comment out and go to Edit --> Box-Comment. It'll do it all for you.