I wrote a VB dungeon generator from Appendix C: Random Dungeon Generation Tables in the Advanced Dungeons and Dragons Dungeon Masters Guide back in the day. It made some totally awesome dungeons and output them in a bmp that had a light-blue grid, black dungeon walls and floodfill areas in the rooms and halls. It compiled a complete legend of room contents, door information, trap information, etc., and output that as a text file. I will have to search and see if I can find it.