Call sub B 60 times every second while sub A is runnin

[Mushy peas]

I do not know if this is multithreading. But I would like to call Sub B every 1/60th seconds when Sub A is running. The structure of my code is something like this:

Sub LongProcedure()
    LongProcedure1
    LongProcedure2
    LongProcedure3
End Sub

Sub UserFormUpdate()
' update userform here
' I would like to call this 60 times per second
End Sub