Is it possible to format time in [h]:mm format using VBA?

[h]:mm format in excel would show 25 hours as 25:00, 125 hours as 125:00

I've tried several things such as:

format(datetime, "[h]:mm")
format(datetime, "H:mm")
format(datetime, "hh:mm")

None of these have the desired effect. I've also had a look through the MS help and can't find anything useful.

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