VBA string with milliseconds to date

Question

I have a string in the form \"yyyy-mm-dd hh:mm:ss.mmm\" (where the end is milliseconds)

I\'d like to convert it to a number, preferably a Date

Answer 1

A Date type holds the number of days since December 30 1899 with a precision of one second. Though it's still possible to hold the milliseconds by storing the date in a currency type since it can hold 4 extra digits compared to a Date/Double.

So an alternative would be to store the date as a timestamp in a Currency type representing the number of seconds since December 30 1899:

Public Function CDateEx(text As String) As Currency
    Dim parts() As String
    parts = Split(text, ".")
    CDateEx = CCur(CDate(parts(0)) * 86400) + CCur(parts(1) / 1000)
End Function

And to convert the timestamp back to a string:

Public Function FormatDateEx(dt As Currency) As String
    FormatDateEx = Format(dt / 86400, "yyyy-mm-dd HH:mm:ss") & "." & ((dt - Fix(dt)) * 1000)
End Function