WinXP SP2, Excel XP

I found Chip Pearson's Date Time help:
(http://www.cpearson.com/excel/DateTimeEntry.htm)

However, his Worksheet_Charge example VBA Subroutines are either for
Dates or Times.

I need to handle Date + Time in the same field.

I have tried to combine Chip's two example Subroutines into one, but
have not managed to make a single Subroutine that will handle inputs
like "MMDDYY HHMM" [preferred input]

I have not been able to figure out why Chip's Datevalue Sub uses
".Formula" and the TimeValue Sub uses ".Value" when extracting the user
input.

Suggestions?

Texas Handly