I have an edit control which will have 2 type of input either a time in the format 13:00 or a session ID in the format ABCD.

Can I change the valid property on the fly from 'MT' when field is time type to 4A, when the field is session ID type.

suggestion welcome

Tony,

(0)

I don't know if it can be done, and foresee some problems.

(1)

One solution would be for youto change your mind and have two different fields X and Y, and perhaps an additional field Z - a logical one - that knows which of the former two is used.

In you form have a checkbox or pair of radio buttons for Z, preceeding the controls for X and Y. Have the controls for both X and Y inactive. Then when Z is filled in (on its CLICK and READ handlers), check its value and set the relevant control of the X-Y pair active, and the other one inactive.

You can still have one field in reports, and other places where you present your data. Use a symbolic for those purposes.

(2)

A different alternative would be to write your own UDC for the field - a function that does the necessary validation and conversion. It's a bit different from how it's done in Arev. But people (and postings) on the lists can help you.

In case - how do you want your time data stored? Like displayed? Or as internal time values?

- Oystein -

You should be able to set the CONV and VALID properties - failing that you can amend the Window common (see SENL passim) on the fly. We did this for AmSys a few years back.

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What if he wants to use the field in a report?

- Oystein -

thanks for responses.

I have decided on a variation of Oystein's suggestion

use two fields and make appropriate one visible which has the revelant validation properties already set

many thanks

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