let func =   
 (Start as datetime, End as datetime) =>
    List.Transform( {0..Number.Round(Number.From(End- Start)*24, 0)}, each Start + #duration(0, _, 0, 0)) ,
documentation = [
Documentation.Name =  " DateTime.HoursBetween ",
Documentation.Description = " Returns a list of hours (datetime) that lie between the <code>Start</code> and <code>End</code>  ",
Documentation.LongDescription = " Returns a list of hours (datetime) that lie between the <code>Start</code> and <code>End</code>  ",
Documentation.Category = " DateTime ",
Documentation.Source = " . https://goo.gl/1mJHpP . ",
Documentation.Version = " 1.0 ",
Documentation.Author = " BillSzysz https://goo.gl/1mJHpP . ",
Documentation.Examples = {[Description =  "  ",
Code = " DateTime.HoursBetween( #datetime(2018, 7, 8, 1, 0, 0), #datetime(2018, 7, 8, 4, 29, 0) ) ",
Result = " {""08/07/2018 01:00:00"", ""08/07/2018 02:00:00"", ""08/07/2018 03:00:00"", ""08/07/2018 04:00:00""} "]}]
  
 in  
  Value.ReplaceType(func, Value.ReplaceMetadata(Value.Type(func), documentation))