Hi guys

I have a single cell in which a time window (in lack of a better word!) has been exported in text format, like this:

10:15-15:00

What I need as a result into another cell is the difference between those times in hours and minutes, in this case four hours and forty-five minutes (4:45)

The formula should work with times between 0:00-23:59, also with times that pass midnight (ex. 23:00-5:00 = 6.0 hours)

I wasn't able to figure out a combo that works. How could I accomplish this?