Integration
MIDI to CV and CV to MIDI. This allows note data to flow between your DAW and your Eurorack. This may also include MIDI CC messages being translated to CV in Eurorack and back again. The more CV inputs and outputs... the higher the cost.
DAW audio to CV. This can be done via a USB module acting as an audio interface (like the Expert Sleepers ES8 or ES9) or an audio interface that is DC coupled. The ES series can be used for audio AND CV flowing between the DAW and Eurorack rig. So you can record, playback, and modulate the DAW and Eurorack modules... true integration. But be aware of latency. It's a fact of life with audio interfaces.
Many audio interfaces remove DC voltage because it's typically not audio and is usually an unwanted artifact. So it's best to check around.
As far as DAW software: Ableton Live with CV Tools, Bitwig Audio, and for a free virtual Eurorack environment VCV Rack.