Subtracting minutes from a Time?

[CTOROCK]

I have a Time value of 8:30 pm, and I want it to represent 8 hours and 30 minutes instead of 8:30 pm. I then want to subtract 50 minutes from that. How would I do this since the 50 minutes is a Single.
can I DtTime - TimeValue(SngTime) sngtime being the #
How can I subtract only a couple of minutes from a time?
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[cainemart]

Couldn't you convert the 8 hours to minutes then add the other 30 minutes to this total then subtract the minutes you want removed? You might also check DateDiff in help.

cainebean