How do I connect an LCD monitor to be the display for a VHS VCR?
If your VCR has RCA video out you will need an RCA to VGA (d-sub) converter.
I never tried these but there are many out there. Depending on your budget and video quality needed.
There are any number of video to VGA converters like these. Google around and you can find more. Prices vary widely and I don't have any direct experience to recommend one over another.
I think you need a TV Tuner card, because monitors are designed for a higher refresh rate so the picture would have to be digitized. The bonus though is that you would get to also watch tv on it. I picked one up on eBay for about $15 and I set it to record all my shows as a DVR.
If your monitor has composite cables on it, you could hook it up through those, but the pic quality is not going to be so great coming off VHS.