here is what I came up with so far:
### sample connection to DGN files using OGR
LAYER
NAME "FDP_093I100_dgn"
TYPE LINE
STATUS ON
CONNECTIONTYPE OGR
CONNECTION "d:/sclark1/TPL/FDP093I100.dgn"
METADATA
WMS_TITLE "sample FDP 2001"
WMS_ABSTRACT "N/A"
WMS_SRS "EPSG:26910"
END
END
thanks
Stephen