We'd like to use comboboxes similar to Outlook in a VFP 6.0 app, for the entry of time values. When I say 'similar to Outlook', I mean the following behaviors:

Preset list of times (every half hour or so)

User can type in the desired time if it's not displayed. Formatting is updated when they leave the field

When the start time is changed, the end time changes accordingly

When the start time is changed, the rowsource for the end time combobox is modified to exclude times earlier than listed in the start time combobox

If the user wants to change the length of the appointment, they do so by simply changing the end time (via typing or selection), which does not affect the start time.

We would like to store the time as a string in the format 'HH:MM AM'

Ideally, we want an all-VFP solution

Has anyone done this before? Any pointers or gotchas on doing it?
Thanks!
zahid