Hooking up a vocoder in your DAW can be tricky. Here's a tutorial showing how to do it in Propellerheads Reason (works pretty much the same in other DAWs) to produce classic robot voices. This demonstration uses the free TAL vocoder plugin. The video also covers how to use an arpeggiator (the RPG-8 in this demo) to get the energetic song-filling effect like Midnight Star's Freak-A-Zoid. These are synthesizer staples of 80's funk and dance music.
Bonus cover of Freak-A-Zoid and misc. tips and trivia. This cover of the song was reproduced almost entirely on Roland (Cloud) Juno 106 VST plugins. Also uses Arturia's Spark drum machine plugin as a Drumtrax emulator.
I''ll answer questions in the comments!